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Finding the Fourth Proportional to 898.37, 1,347.57 and 411.38

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Solution

The fourth proportional to 898.37, 1,347.57 and 411.38 is: 617.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.37 : 1,347.57 = 411.38 : x
  2. Step 2: Convert to fraction form
    898.37/1,347.57 = 411.38/x
  3. Step 3: Cross multiply
    898.37x = 1,347.57 × 411.38
  4. Step 4: Simplify right side
    898.37x = 554,356.61
  5. Step 5: Solve for x
    x = 554,356.61/898.37
  6. Step 6: Final answer
    x = 617.07

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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.