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Finding the Fourth Proportional to 898.96, 1,241.90 and 711.84

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Solution

The fourth proportional to 898.96, 1,241.90 and 711.84 is: 983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.96 : 1,241.90 = 711.84 : x
  2. Step 2: Convert to fraction form
    898.96/1,241.90 = 711.84/x
  3. Step 3: Cross multiply
    898.96x = 1,241.90 × 711.84
  4. Step 4: Simplify right side
    898.96x = 884,034.10
  5. Step 5: Solve for x
    x = 884,034.10/898.96
  6. Step 6: Final answer
    x = 983.40

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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.