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Finding the Fourth Proportional to 1,025.88, 1,531.62 and 929.02

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Solution

The fourth proportional to 1,025.88, 1,531.62 and 929.02 is: 1,387.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.88 : 1,531.62 = 929.02 : x
  2. Step 2: Convert to fraction form
    1,025.88/1,531.62 = 929.02/x
  3. Step 3: Cross multiply
    1,025.88x = 1,531.62 × 929.02
  4. Step 4: Simplify right side
    1,025.88x = 1,422,905.96
  5. Step 5: Solve for x
    x = 1,422,905.96/1,025.88
  6. Step 6: Final answer
    x = 1,387.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.