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Finding the Fourth Proportional to 611,904.20, 917,856.30 and 471,936.20

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Solution

The fourth proportional to 611,904.20, 917,856.30 and 471,936.20 is: 707,904.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,904.20 : 917,856.30 = 471,936.20 : x
  2. Step 2: Convert to fraction form
    611,904.20/917,856.30 = 471,936.20/x
  3. Step 3: Cross multiply
    611,904.20x = 917,856.30 × 471,936.20
  4. Step 4: Simplify right side
    611,904.20x = 433,169,614,368.06
  5. Step 5: Solve for x
    x = 433,169,614,368.06/611,904.20
  6. Step 6: Final answer
    x = 707,904.30

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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.