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Finding the Fourth Proportional to 813,704.64, 1,122,978.95 and 451,242.20

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Solution

The fourth proportional to 813,704.64, 1,122,978.95 and 451,242.20 is: 622,751.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,704.64 : 1,122,978.95 = 451,242.20 : x
  2. Step 2: Convert to fraction form
    813,704.64/1,122,978.95 = 451,242.20/x
  3. Step 3: Cross multiply
    813,704.64x = 1,122,978.95 × 451,242.20
  4. Step 4: Simplify right side
    813,704.64x = 506,735,484,080.58
  5. Step 5: Solve for x
    x = 506,735,484,080.58/813,704.64
  6. Step 6: Final answer
    x = 622,751.13

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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.