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Finding the Fourth Proportional to 698.76, 964.22 and 418.95

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Solution

The fourth proportional to 698.76, 964.22 and 418.95 is: 578.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.76 : 964.22 = 418.95 : x
  2. Step 2: Convert to fraction form
    698.76/964.22 = 418.95/x
  3. Step 3: Cross multiply
    698.76x = 964.22 × 418.95
  4. Step 4: Simplify right side
    698.76x = 403,957.87
  5. Step 5: Solve for x
    x = 403,957.87/698.76
  6. Step 6: Final answer
    x = 578.11

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Find fourth proportional to 349.38, 482.11 and 209.48
Half scale
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Double scale
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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.