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Finding the Fourth Proportional to 866,814.60, 1,300,221.90 and 860,909.70

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Solution

The fourth proportional to 866,814.60, 1,300,221.90 and 860,909.70 is: 1,291,364.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,814.60 : 1,300,221.90 = 860,909.70 : x
  2. Step 2: Convert to fraction form
    866,814.60/1,300,221.90 = 860,909.70/x
  3. Step 3: Cross multiply
    866,814.60x = 1,300,221.90 × 860,909.70
  4. Step 4: Simplify right side
    866,814.60x = 1,119,373,645,862.43
  5. Step 5: Solve for x
    x = 1,119,373,645,862.43/866,814.60
  6. Step 6: Final answer
    x = 1,291,364.55

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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.