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Finding the Fourth Proportional to 679.06, 935.95 and 653.55

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Solution

The fourth proportional to 679.06, 935.95 and 653.55 is: 900.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.06 : 935.95 = 653.55 : x
  2. Step 2: Convert to fraction form
    679.06/935.95 = 653.55/x
  3. Step 3: Cross multiply
    679.06x = 935.95 × 653.55
  4. Step 4: Simplify right side
    679.06x = 611,690.12
  5. Step 5: Solve for x
    x = 611,690.12/679.06
  6. Step 6: Final answer
    x = 900.79

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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.