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Finding the Fourth Proportional to 900.50, 1,348.79 and 488.76

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Solution

The fourth proportional to 900.50, 1,348.79 and 488.76 is: 732.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.50 : 1,348.79 = 488.76 : x
  2. Step 2: Convert to fraction form
    900.50/1,348.79 = 488.76/x
  3. Step 3: Cross multiply
    900.50x = 1,348.79 × 488.76
  4. Step 4: Simplify right side
    900.50x = 659,232.16
  5. Step 5: Solve for x
    x = 659,232.16/900.50
  6. Step 6: Final answer
    x = 732.08

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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.