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Finding the Fourth Proportional to 438,434.10, 657,651.15 and 399,726.90

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Solution

The fourth proportional to 438,434.10, 657,651.15 and 399,726.90 is: 599,590.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,434.10 : 657,651.15 = 399,726.90 : x
  2. Step 2: Convert to fraction form
    438,434.10/657,651.15 = 399,726.90/x
  3. Step 3: Cross multiply
    438,434.10x = 657,651.15 × 399,726.90
  4. Step 4: Simplify right side
    438,434.10x = 262,880,855,470.94
  5. Step 5: Solve for x
    x = 262,880,855,470.94/438,434.10
  6. Step 6: Final answer
    x = 599,590.35

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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.