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Finding the Fourth Proportional to 677.36, 934.16 and 415.28

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Solution

The fourth proportional to 677.36, 934.16 and 415.28 is: 572.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.36 : 934.16 = 415.28 : x
  2. Step 2: Convert to fraction form
    677.36/934.16 = 415.28/x
  3. Step 3: Cross multiply
    677.36x = 934.16 × 415.28
  4. Step 4: Simplify right side
    677.36x = 387,937.96
  5. Step 5: Solve for x
    x = 387,937.96/677.36
  6. Step 6: Final answer
    x = 572.72

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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.