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Finding the Fourth Proportional to 948.77, 1,423.96 and 487.00

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Solution

The fourth proportional to 948.77, 1,423.96 and 487.00 is: 730.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.77 : 1,423.96 = 487.00 : x
  2. Step 2: Convert to fraction form
    948.77/1,423.96 = 487.00/x
  3. Step 3: Cross multiply
    948.77x = 1,423.96 × 487.00
  4. Step 4: Simplify right side
    948.77x = 693,458.97
  5. Step 5: Solve for x
    x = 693,458.97/948.77
  6. Step 6: Final answer
    x = 730.90

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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.