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Finding the Fourth Proportional to 987.10, 1,480.56 and 500.48

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Solution

The fourth proportional to 987.10, 1,480.56 and 500.48 is: 750.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.10 : 1,480.56 = 500.48 : x
  2. Step 2: Convert to fraction form
    987.10/1,480.56 = 500.48/x
  3. Step 3: Cross multiply
    987.10x = 1,480.56 × 500.48
  4. Step 4: Simplify right side
    987.10x = 740,990.67
  5. Step 5: Solve for x
    x = 740,990.67/987.10
  6. Step 6: Final answer
    x = 750.67

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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.