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Finding the Fourth Proportional to 767.47, 1,059.12 and 418.16

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Solution

The fourth proportional to 767.47, 1,059.12 and 418.16 is: 577.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.47 : 1,059.12 = 418.16 : x
  2. Step 2: Convert to fraction form
    767.47/1,059.12 = 418.16/x
  3. Step 3: Cross multiply
    767.47x = 1,059.12 × 418.16
  4. Step 4: Simplify right side
    767.47x = 442,874.23
  5. Step 5: Solve for x
    x = 442,874.23/767.47
  6. Step 6: Final answer
    x = 577.06

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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.