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Finding the Fourth Proportional to 1,307.59, 1,959.84 and 575.64

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Solution

The fourth proportional to 1,307.59, 1,959.84 and 575.64 is: 862.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.59 : 1,959.84 = 575.64 : x
  2. Step 2: Convert to fraction form
    1,307.59/1,959.84 = 575.64/x
  3. Step 3: Cross multiply
    1,307.59x = 1,959.84 × 575.64
  4. Step 4: Simplify right side
    1,307.59x = 1,128,162.30
  5. Step 5: Solve for x
    x = 1,128,162.30/1,307.59
  6. Step 6: Final answer
    x = 862.78

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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.