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Finding the Fourth Proportional to 988.04, 1,363.56 and 615.03

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Solution

The fourth proportional to 988.04, 1,363.56 and 615.03 is: 848.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.04 : 1,363.56 = 615.03 : x
  2. Step 2: Convert to fraction form
    988.04/1,363.56 = 615.03/x
  3. Step 3: Cross multiply
    988.04x = 1,363.56 × 615.03
  4. Step 4: Simplify right side
    988.04x = 838,630.31
  5. Step 5: Solve for x
    x = 838,630.31/988.04
  6. Step 6: Final answer
    x = 848.79

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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.