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Finding the Fourth Proportional to 543,449.10, 748,726.11 and 420,518.82

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Solution

The fourth proportional to 543,449.10, 748,726.11 and 420,518.82 is: 579,361.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,449.10 : 748,726.11 = 420,518.82 : x
  2. Step 2: Convert to fraction form
    543,449.10/748,726.11 = 420,518.82/x
  3. Step 3: Cross multiply
    543,449.10x = 748,726.11 × 420,518.82
  4. Step 4: Simplify right side
    543,449.10x = 314,853,416,536.76
  5. Step 5: Solve for x
    x = 314,853,416,536.76/543,449.10
  6. Step 6: Final answer
    x = 579,361.37

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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.