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Finding the Fourth Proportional to 988.62, 1,365.06 and 741

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Solution

The fourth proportional to 988.62, 1,365.06 and 741 is: 1,023.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.62 : 1,365.06 = 741 : x
  2. Step 2: Convert to fraction form
    988.62/1,365.06 = 741/x
  3. Step 3: Cross multiply
    988.62x = 1,365.06 × 741
  4. Step 4: Simplify right side
    988.62x = 1,011,509.46
  5. Step 5: Solve for x
    x = 1,011,509.46/988.62
  6. Step 6: Final answer
    x = 1,023.15

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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.