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Finding the Fourth Proportional to 621,476.16, 857,151.18 and 403,755

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Solution

The fourth proportional to 621,476.16, 857,151.18 and 403,755 is: 556,866.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,476.16 : 857,151.18 = 403,755 : x
  2. Step 2: Convert to fraction form
    621,476.16/857,151.18 = 403,755/x
  3. Step 3: Cross multiply
    621,476.16x = 857,151.18 × 403,755
  4. Step 4: Simplify right side
    621,476.16x = 346,079,074,680.90
  5. Step 5: Solve for x
    x = 346,079,074,680.90/621,476.16
  6. Step 6: Final answer
    x = 556,866.21

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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.