Home / 640,923.40-961,385.10-491,624.20

Finding the Fourth Proportional to 640,923.40, 961,385.10 and 491,624.20

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Solution

The fourth proportional to 640,923.40, 961,385.10 and 491,624.20 is: 737,436.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,923.40 : 961,385.10 = 491,624.20 : x
  2. Step 2: Convert to fraction form
    640,923.40/961,385.10 = 491,624.20/x
  3. Step 3: Cross multiply
    640,923.40x = 961,385.10 × 491,624.20
  4. Step 4: Simplify right side
    640,923.40x = 472,640,180,679.42
  5. Step 5: Solve for x
    x = 472,640,180,679.42/640,923.40
  6. Step 6: Final answer
    x = 737,436.30

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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.