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Finding the Fourth Proportional to 911,569.60, 1,367,354.40 and 645,630.40

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Solution

The fourth proportional to 911,569.60, 1,367,354.40 and 645,630.40 is: 968,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,569.60 : 1,367,354.40 = 645,630.40 : x
  2. Step 2: Convert to fraction form
    911,569.60/1,367,354.40 = 645,630.40/x
  3. Step 3: Cross multiply
    911,569.60x = 1,367,354.40 × 645,630.40
  4. Step 4: Simplify right side
    911,569.60x = 882,805,568,213.76
  5. Step 5: Solve for x
    x = 882,805,568,213.76/911,569.60
  6. Step 6: Final answer
    x = 968,445.60

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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.