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Finding the Fourth Proportional to 651.40, 898.87 and 371.70

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Solution

The fourth proportional to 651.40, 898.87 and 371.70 is: 512.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.40 : 898.87 = 371.70 : x
  2. Step 2: Convert to fraction form
    651.40/898.87 = 371.70/x
  3. Step 3: Cross multiply
    651.40x = 898.87 × 371.70
  4. Step 4: Simplify right side
    651.40x = 334,109.98
  5. Step 5: Solve for x
    x = 334,109.98/651.40
  6. Step 6: Final answer
    x = 512.91

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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.