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Finding the Fourth Proportional to 748.56, 1,032.12 and 486.48

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Solution

The fourth proportional to 748.56, 1,032.12 and 486.48 is: 670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.56 : 1,032.12 = 486.48 : x
  2. Step 2: Convert to fraction form
    748.56/1,032.12 = 486.48/x
  3. Step 3: Cross multiply
    748.56x = 1,032.12 × 486.48
  4. Step 4: Simplify right side
    748.56x = 502,105.74
  5. Step 5: Solve for x
    x = 502,105.74/748.56
  6. Step 6: Final answer
    x = 670.76

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1.5x scale

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.