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Finding the Fourth Proportional to 1,060.55, 1,590.33 and 402.56

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Solution

The fourth proportional to 1,060.55, 1,590.33 and 402.56 is: 603.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.55 : 1,590.33 = 402.56 : x
  2. Step 2: Convert to fraction form
    1,060.55/1,590.33 = 402.56/x
  3. Step 3: Cross multiply
    1,060.55x = 1,590.33 × 402.56
  4. Step 4: Simplify right side
    1,060.55x = 640,195.29
  5. Step 5: Solve for x
    x = 640,195.29/1,060.55
  6. Step 6: Final answer
    x = 603.64

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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.