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Finding the Fourth Proportional to 1,085.80, 1,629.18 and 437.02

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Solution

The fourth proportional to 1,085.80, 1,629.18 and 437.02 is: 655.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.80 : 1,629.18 = 437.02 : x
  2. Step 2: Convert to fraction form
    1,085.80/1,629.18 = 437.02/x
  3. Step 3: Cross multiply
    1,085.80x = 1,629.18 × 437.02
  4. Step 4: Simplify right side
    1,085.80x = 711,984.24
  5. Step 5: Solve for x
    x = 711,984.24/1,085.80
  6. Step 6: Final answer
    x = 655.72

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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.