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Finding the Fourth Proportional to 1,023.62, 1,535.40 and 439.00

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Solution

The fourth proportional to 1,023.62, 1,535.40 and 439.00 is: 658.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.62 : 1,535.40 = 439.00 : x
  2. Step 2: Convert to fraction form
    1,023.62/1,535.40 = 439.00/x
  3. Step 3: Cross multiply
    1,023.62x = 1,535.40 × 439.00
  4. Step 4: Simplify right side
    1,023.62x = 674,036.76
  5. Step 5: Solve for x
    x = 674,036.76/1,023.62
  6. Step 6: Final answer
    x = 658.49

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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.