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Finding the Fourth Proportional to 1,007.56, 1,511.88 and 358.75

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Solution

The fourth proportional to 1,007.56, 1,511.88 and 358.75 is: 538.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.56 : 1,511.88 = 358.75 : x
  2. Step 2: Convert to fraction form
    1,007.56/1,511.88 = 358.75/x
  3. Step 3: Cross multiply
    1,007.56x = 1,511.88 × 358.75
  4. Step 4: Simplify right side
    1,007.56x = 542,386.95
  5. Step 5: Solve for x
    x = 542,386.95/1,007.56
  6. Step 6: Final answer
    x = 538.32

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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.