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Finding the Fourth Proportional to 658.84, 907.35 and 644.49

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Solution

The fourth proportional to 658.84, 907.35 and 644.49 is: 887.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.84 : 907.35 = 644.49 : x
  2. Step 2: Convert to fraction form
    658.84/907.35 = 644.49/x
  3. Step 3: Cross multiply
    658.84x = 907.35 × 644.49
  4. Step 4: Simplify right side
    658.84x = 584,773.46
  5. Step 5: Solve for x
    x = 584,773.46/658.84
  6. Step 6: Final answer
    x = 887.58

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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.