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Finding the Fourth Proportional to 551,421.20, 827,131.80 and 502,432.40

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Solution

The fourth proportional to 551,421.20, 827,131.80 and 502,432.40 is: 753,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,421.20 : 827,131.80 = 502,432.40 : x
  2. Step 2: Convert to fraction form
    551,421.20/827,131.80 = 502,432.40/x
  3. Step 3: Cross multiply
    551,421.20x = 827,131.80 × 502,432.40
  4. Step 4: Simplify right side
    551,421.20x = 415,577,815,390.32
  5. Step 5: Solve for x
    x = 415,577,815,390.32/551,421.20
  6. Step 6: Final answer
    x = 753,648.60

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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.