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Finding the Fourth Proportional to 1,060.55, 1,590.80 and 320.17

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Solution

The fourth proportional to 1,060.55, 1,590.80 and 320.17 is: 480.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.55 : 1,590.80 = 320.17 : x
  2. Step 2: Convert to fraction form
    1,060.55/1,590.80 = 320.17/x
  3. Step 3: Cross multiply
    1,060.55x = 1,590.80 × 320.17
  4. Step 4: Simplify right side
    1,060.55x = 509,320.86
  5. Step 5: Solve for x
    x = 509,320.86/1,060.55
  6. Step 6: Final answer
    x = 480.24

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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.