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Finding the Fourth Proportional to 518,815.92, 777,990.60 and 502,486.32

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Solution

The fourth proportional to 518,815.92, 777,990.60 and 502,486.32 is: 753,503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,815.92 : 777,990.60 = 502,486.32 : x
  2. Step 2: Convert to fraction form
    518,815.92/777,990.60 = 502,486.32/x
  3. Step 3: Cross multiply
    518,815.92x = 777,990.60 × 502,486.32
  4. Step 4: Simplify right side
    518,815.92x = 390,929,633,588.59
  5. Step 5: Solve for x
    x = 390,929,633,588.59/518,815.92
  6. Step 6: Final answer
    x = 753,503.54

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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.