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Finding the Fourth Proportional to 518,238, 715,347.42 and 303,447.12

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Solution

The fourth proportional to 518,238, 715,347.42 and 303,447.12 is: 418,861.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,238 : 715,347.42 = 303,447.12 : x
  2. Step 2: Convert to fraction form
    518,238/715,347.42 = 303,447.12/x
  3. Step 3: Cross multiply
    518,238x = 715,347.42 × 303,447.12
  4. Step 4: Simplify right side
    518,238x = 217,070,114,398.43
  5. Step 5: Solve for x
    x = 217,070,114,398.43/518,238
  6. Step 6: Final answer
    x = 418,861.82

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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.