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Finding the Fourth Proportional to 1,303.59, 1,959.21 and 1,085.61

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Solution

The fourth proportional to 1,303.59, 1,959.21 and 1,085.61 is: 1,631.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,303.59 : 1,959.21 = 1,085.61 : x
  2. Step 2: Convert to fraction form
    1,303.59/1,959.21 = 1,085.61/x
  3. Step 3: Cross multiply
    1,303.59x = 1,959.21 × 1,085.61
  4. Step 4: Simplify right side
    1,303.59x = 2,126,937.97
  5. Step 5: Solve for x
    x = 2,126,937.97/1,303.59
  6. Step 6: Final answer
    x = 1,631.60

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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.