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Finding the Fourth Proportional to 618,654.92, 928,092.53 and 319,054.55

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Solution

The fourth proportional to 618,654.92, 928,092.53 and 319,054.55 is: 478,638.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,654.92 : 928,092.53 = 319,054.55 : x
  2. Step 2: Convert to fraction form
    618,654.92/928,092.53 = 319,054.55/x
  3. Step 3: Cross multiply
    618,654.92x = 928,092.53 × 319,054.55
  4. Step 4: Simplify right side
    618,654.92x = 296,112,140,674.69
  5. Step 5: Solve for x
    x = 296,112,140,674.69/618,654.92
  6. Step 6: Final answer
    x = 478,638.63

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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.