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Finding the Fourth Proportional to 738.25, 1,019.16 and 698.05

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Solution

The fourth proportional to 738.25, 1,019.16 and 698.05 is: 963.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.25 : 1,019.16 = 698.05 : x
  2. Step 2: Convert to fraction form
    738.25/1,019.16 = 698.05/x
  3. Step 3: Cross multiply
    738.25x = 1,019.16 × 698.05
  4. Step 4: Simplify right side
    738.25x = 711,424.64
  5. Step 5: Solve for x
    x = 711,424.64/738.25
  6. Step 6: Final answer
    x = 963.66

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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.