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Finding the Fourth Proportional to 987,080.64, 1,362,116.16 and 557,448

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Solution

The fourth proportional to 987,080.64, 1,362,116.16 and 557,448 is: 769,247.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,080.64 : 1,362,116.16 = 557,448 : x
  2. Step 2: Convert to fraction form
    987,080.64/1,362,116.16 = 557,448/x
  3. Step 3: Cross multiply
    987,080.64x = 1,362,116.16 × 557,448
  4. Step 4: Simplify right side
    987,080.64x = 759,308,929,159.68
  5. Step 5: Solve for x
    x = 759,308,929,159.68/987,080.64
  6. Step 6: Final answer
    x = 769,247.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.