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Finding the Fourth Proportional to 468.98, 703.51 and 139.89

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Solution

The fourth proportional to 468.98, 703.51 and 139.89 is: 209.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.98 : 703.51 = 139.89 : x
  2. Step 2: Convert to fraction form
    468.98/703.51 = 139.89/x
  3. Step 3: Cross multiply
    468.98x = 703.51 × 139.89
  4. Step 4: Simplify right side
    468.98x = 98,415.61
  5. Step 5: Solve for x
    x = 98,415.61/468.98
  6. Step 6: Final answer
    x = 209.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.