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Finding the Fourth Proportional to 611,906.20, 917,859.30 and 471,938.20

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Solution

The fourth proportional to 611,906.20, 917,859.30 and 471,938.20 is: 707,907.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,906.20 : 917,859.30 = 471,938.20 : x
  2. Step 2: Convert to fraction form
    611,906.20/917,859.30 = 471,938.20/x
  3. Step 3: Cross multiply
    611,906.20x = 917,859.30 × 471,938.20
  4. Step 4: Simplify right side
    611,906.20x = 433,172,865,895.26
  5. Step 5: Solve for x
    x = 433,172,865,895.26/611,906.20
  6. Step 6: Final answer
    x = 707,907.30

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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.