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Finding the Fourth Proportional to 873,792.80, 1,310,689.20 and 747,821.60

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Solution

The fourth proportional to 873,792.80, 1,310,689.20 and 747,821.60 is: 1,121,732.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,792.80 : 1,310,689.20 = 747,821.60 : x
  2. Step 2: Convert to fraction form
    873,792.80/1,310,689.20 = 747,821.60/x
  3. Step 3: Cross multiply
    873,792.80x = 1,310,689.20 × 747,821.60
  4. Step 4: Simplify right side
    873,792.80x = 980,161,694,646.72
  5. Step 5: Solve for x
    x = 980,161,694,646.72/873,792.80
  6. Step 6: Final answer
    x = 1,121,732.40

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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.