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Finding the Fourth Proportional to 520,656.80, 718,294.40 and 339,302.66

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Solution

The fourth proportional to 520,656.80, 718,294.40 and 339,302.66 is: 468,099.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,656.80 : 718,294.40 = 339,302.66 : x
  2. Step 2: Convert to fraction form
    520,656.80/718,294.40 = 339,302.66/x
  3. Step 3: Cross multiply
    520,656.80x = 718,294.40 × 339,302.66
  4. Step 4: Simplify right side
    520,656.80x = 243,719,195,295.12
  5. Step 5: Solve for x
    x = 243,719,195,295.12/520,656.80
  6. Step 6: Final answer
    x = 468,099.52

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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.