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Finding the Fourth Proportional to 911,909.75, 1,367,892.50 and 312,862.50

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Solution

The fourth proportional to 911,909.75, 1,367,892.50 and 312,862.50 is: 469,303.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,909.75 : 1,367,892.50 = 312,862.50 : x
  2. Step 2: Convert to fraction form
    911,909.75/1,367,892.50 = 312,862.50/x
  3. Step 3: Cross multiply
    911,909.75x = 1,367,892.50 × 312,862.50
  4. Step 4: Simplify right side
    911,909.75x = 427,962,265,716.94
  5. Step 5: Solve for x
    x = 427,962,265,716.94/911,909.75
  6. Step 6: Final answer
    x = 469,303.31

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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.