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Finding the Fourth Proportional to 988.62, 1,346.01 and 985.53

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Solution

The fourth proportional to 988.62, 1,346.01 and 985.53 is: 1,341.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.62 : 1,346.01 = 985.53 : x
  2. Step 2: Convert to fraction form
    988.62/1,346.01 = 985.53/x
  3. Step 3: Cross multiply
    988.62x = 1,346.01 × 985.53
  4. Step 4: Simplify right side
    988.62x = 1,326,534.59
  5. Step 5: Solve for x
    x = 1,326,534.59/988.62
  6. Step 6: Final answer
    x = 1,341.81

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.