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Finding the Fourth Proportional to 1,279,374, 1,765,691.64 and 742,830

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Solution

The fourth proportional to 1,279,374, 1,765,691.64 and 742,830 is: 1,025,195.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,374 : 1,765,691.64 = 742,830 : x
  2. Step 2: Convert to fraction form
    1,279,374/1,765,691.64 = 742,830/x
  3. Step 3: Cross multiply
    1,279,374x = 1,765,691.64 × 742,830
  4. Step 4: Simplify right side
    1,279,374x = 1,311,608,720,941.20
  5. Step 5: Solve for x
    x = 1,311,608,720,941.20/1,279,374
  6. Step 6: Final answer
    x = 1,025,195.70

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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.