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Finding the Fourth Proportional to 612,503.20, 917,005.20 and 549,517.60

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Solution

The fourth proportional to 612,503.20, 917,005.20 and 549,517.60 is: 822,706.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,503.20 : 917,005.20 = 549,517.60 : x
  2. Step 2: Convert to fraction form
    612,503.20/917,005.20 = 549,517.60/x
  3. Step 3: Cross multiply
    612,503.20x = 917,005.20 × 549,517.60
  4. Step 4: Simplify right side
    612,503.20x = 503,910,496,691.52
  5. Step 5: Solve for x
    x = 503,910,496,691.52/612,503.20
  6. Step 6: Final answer
    x = 822,706.72

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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.