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Finding the Fourth Proportional to 1,311,287.03, 1,966,432.31 and 627,471.93

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Solution

The fourth proportional to 1,311,287.03, 1,966,432.31 and 627,471.93 is: 940,969.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,287.03 : 1,966,432.31 = 627,471.93 : x
  2. Step 2: Convert to fraction form
    1,311,287.03/1,966,432.31 = 627,471.93/x
  3. Step 3: Cross multiply
    1,311,287.03x = 1,966,432.31 × 627,471.93
  4. Step 4: Simplify right side
    1,311,287.03x = 1,233,881,073,632.70
  5. Step 5: Solve for x
    x = 1,233,881,073,632.70/1,311,287.03
  6. Step 6: Final answer
    x = 940,969.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.