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Finding the Fourth Proportional to 373,430.81, 515,332.17 and 212,285.87

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Solution

The fourth proportional to 373,430.81, 515,332.17 and 212,285.87 is: 292,953.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,430.81 : 515,332.17 = 212,285.87 : x
  2. Step 2: Convert to fraction form
    373,430.81/515,332.17 = 212,285.87/x
  3. Step 3: Cross multiply
    373,430.81x = 515,332.17 × 212,285.87
  4. Step 4: Simplify right side
    373,430.81x = 109,397,735,470.78
  5. Step 5: Solve for x
    x = 109,397,735,470.78/373,430.81
  6. Step 6: Final answer
    x = 292,953.16

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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.