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Finding the Fourth Proportional to 677.86, 935.45 and 383.13

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Solution

The fourth proportional to 677.86, 935.45 and 383.13 is: 528.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.86 : 935.45 = 383.13 : x
  2. Step 2: Convert to fraction form
    677.86/935.45 = 383.13/x
  3. Step 3: Cross multiply
    677.86x = 935.45 × 383.13
  4. Step 4: Simplify right side
    677.86x = 358,398.96
  5. Step 5: Solve for x
    x = 358,398.96/677.86
  6. Step 6: Final answer
    x = 528.72

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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.