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Finding the Fourth Proportional to 642,656.10, 885,842.32 and 506,471.61

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Solution

The fourth proportional to 642,656.10, 885,842.32 and 506,471.61 is: 698,124.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,656.10 : 885,842.32 = 506,471.61 : x
  2. Step 2: Convert to fraction form
    642,656.10/885,842.32 = 506,471.61/x
  3. Step 3: Cross multiply
    642,656.10x = 885,842.32 × 506,471.61
  4. Step 4: Simplify right side
    642,656.10x = 448,653,986,016.54
  5. Step 5: Solve for x
    x = 448,653,986,016.54/642,656.10
  6. Step 6: Final answer
    x = 698,124.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.