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Finding the Fourth Proportional to 1,255,867.68, 1,732,887.12 and 739,724.40

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Solution

The fourth proportional to 1,255,867.68, 1,732,887.12 and 739,724.40 is: 1,020,695.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255,867.68 : 1,732,887.12 = 739,724.40 : x
  2. Step 2: Convert to fraction form
    1,255,867.68/1,732,887.12 = 739,724.40/x
  3. Step 3: Cross multiply
    1,255,867.68x = 1,732,887.12 × 739,724.40
  4. Step 4: Simplify right side
    1,255,867.68x = 1,281,858,885,109.73
  5. Step 5: Solve for x
    x = 1,281,858,885,109.73/1,255,867.68
  6. Step 6: Final answer
    x = 1,020,695.81

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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.