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Finding the Fourth Proportional to 906,670.80, 1,360,006.20 and 640,950.30

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Solution

The fourth proportional to 906,670.80, 1,360,006.20 and 640,950.30 is: 961,425.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    906,670.80 : 1,360,006.20 = 640,950.30 : x
  2. Step 2: Convert to fraction form
    906,670.80/1,360,006.20 = 640,950.30/x
  3. Step 3: Cross multiply
    906,670.80x = 1,360,006.20 × 640,950.30
  4. Step 4: Simplify right side
    906,670.80x = 871,696,381,891.86
  5. Step 5: Solve for x
    x = 871,696,381,891.86/906,670.80
  6. Step 6: Final answer
    x = 961,425.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.