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Finding the Fourth Proportional to 898.84, 1,347.72 and 487.81

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Solution

The fourth proportional to 898.84, 1,347.72 and 487.81 is: 731.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.84 : 1,347.72 = 487.81 : x
  2. Step 2: Convert to fraction form
    898.84/1,347.72 = 487.81/x
  3. Step 3: Cross multiply
    898.84x = 1,347.72 × 487.81
  4. Step 4: Simplify right side
    898.84x = 657,431.29
  5. Step 5: Solve for x
    x = 657,431.29/898.84
  6. Step 6: Final answer
    x = 731.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.