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Finding the Fourth Proportional to 698.32, 1,046.40 and 606.88

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Solution

The fourth proportional to 698.32, 1,046.40 and 606.88 is: 909.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.32 : 1,046.40 = 606.88 : x
  2. Step 2: Convert to fraction form
    698.32/1,046.40 = 606.88/x
  3. Step 3: Cross multiply
    698.32x = 1,046.40 × 606.88
  4. Step 4: Simplify right side
    698.32x = 635,039.23
  5. Step 5: Solve for x
    x = 635,039.23/698.32
  6. Step 6: Final answer
    x = 909.38

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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.