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Finding the Fourth Proportional to 748.68, 1,032.48 and 486.60

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Solution

The fourth proportional to 748.68, 1,032.48 and 486.60 is: 671.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.68 : 1,032.48 = 486.60 : x
  2. Step 2: Convert to fraction form
    748.68/1,032.48 = 486.60/x
  3. Step 3: Cross multiply
    748.68x = 1,032.48 × 486.60
  4. Step 4: Simplify right side
    748.68x = 502,404.77
  5. Step 5: Solve for x
    x = 502,404.77/748.68
  6. Step 6: Final answer
    x = 671.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.