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Finding the Fourth Proportional to 971,642.60, 1,340,172.62 and 842,349.90

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Solution

The fourth proportional to 971,642.60, 1,340,172.62 and 842,349.90 is: 1,161,841.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    971,642.60 : 1,340,172.62 = 842,349.90 : x
  2. Step 2: Convert to fraction form
    971,642.60/1,340,172.62 = 842,349.90/x
  3. Step 3: Cross multiply
    971,642.60x = 1,340,172.62 × 842,349.90
  4. Step 4: Simplify right side
    971,642.60x = 1,128,894,273,612.20
  5. Step 5: Solve for x
    x = 1,128,894,273,612.20/971,642.60
  6. Step 6: Final answer
    x = 1,161,841.06

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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.