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Finding the Fourth Proportional to 698.67, 963.80 and 418.77

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Solution

The fourth proportional to 698.67, 963.80 and 418.77 is: 577.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.67 : 963.80 = 418.77 : x
  2. Step 2: Convert to fraction form
    698.67/963.80 = 418.77/x
  3. Step 3: Cross multiply
    698.67x = 963.80 × 418.77
  4. Step 4: Simplify right side
    698.67x = 403,603.61
  5. Step 5: Solve for x
    x = 403,603.61/698.67
  6. Step 6: Final answer
    x = 577.68

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1.5x scale

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.