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Finding the Fourth Proportional to 1,043.30, 1,439.65 and 577.52

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Solution

The fourth proportional to 1,043.30, 1,439.65 and 577.52 is: 796.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.30 : 1,439.65 = 577.52 : x
  2. Step 2: Convert to fraction form
    1,043.30/1,439.65 = 577.52/x
  3. Step 3: Cross multiply
    1,043.30x = 1,439.65 × 577.52
  4. Step 4: Simplify right side
    1,043.30x = 831,426.67
  5. Step 5: Solve for x
    x = 831,426.67/1,043.30
  6. Step 6: Final answer
    x = 796.92

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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.