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Finding the Fourth Proportional to 744.48, 1,028.16 and 511.92

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Solution

The fourth proportional to 744.48, 1,028.16 and 511.92 is: 706.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.48 : 1,028.16 = 511.92 : x
  2. Step 2: Convert to fraction form
    744.48/1,028.16 = 511.92/x
  3. Step 3: Cross multiply
    744.48x = 1,028.16 × 511.92
  4. Step 4: Simplify right side
    744.48x = 526,335.67
  5. Step 5: Solve for x
    x = 526,335.67/744.48
  6. Step 6: Final answer
    x = 706.98

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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.