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Finding the Fourth Proportional to 1,007.75, 1,509.92 and 488.00

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Solution

The fourth proportional to 1,007.75, 1,509.92 and 488.00 is: 731.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.75 : 1,509.92 = 488.00 : x
  2. Step 2: Convert to fraction form
    1,007.75/1,509.92 = 488.00/x
  3. Step 3: Cross multiply
    1,007.75x = 1,509.92 × 488.00
  4. Step 4: Simplify right side
    1,007.75x = 736,845.95
  5. Step 5: Solve for x
    x = 736,845.95/1,007.75
  6. Step 6: Final answer
    x = 731.18

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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.