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Finding the Fourth Proportional to 518,807.92, 777,978.60 and 502,478.32

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Solution

The fourth proportional to 518,807.92, 777,978.60 and 502,478.32 is: 753,491.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,807.92 : 777,978.60 = 502,478.32 : x
  2. Step 2: Convert to fraction form
    518,807.92/777,978.60 = 502,478.32/x
  3. Step 3: Cross multiply
    518,807.92x = 777,978.60 × 502,478.32
  4. Step 4: Simplify right side
    518,807.92x = 390,917,379,923.95
  5. Step 5: Solve for x
    x = 390,917,379,923.95/518,807.92
  6. Step 6: Final answer
    x = 753,491.54

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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.