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Finding the Fourth Proportional to 677.95, 935.57 and 383.20

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Solution

The fourth proportional to 677.95, 935.57 and 383.20 is: 528.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.95 : 935.57 = 383.20 : x
  2. Step 2: Convert to fraction form
    677.95/935.57 = 383.20/x
  3. Step 3: Cross multiply
    677.95x = 935.57 × 383.20
  4. Step 4: Simplify right side
    677.95x = 358,509.04
  5. Step 5: Solve for x
    x = 358,509.04/677.95
  6. Step 6: Final answer
    x = 528.82

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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.