Home / 1,415.18-2,123.51-635.72

Finding the Fourth Proportional to 1,415.18, 2,123.51 and 635.72

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Solution

The fourth proportional to 1,415.18, 2,123.51 and 635.72 is: 953.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.18 : 2,123.51 = 635.72 : x
  2. Step 2: Convert to fraction form
    1,415.18/2,123.51 = 635.72/x
  3. Step 3: Cross multiply
    1,415.18x = 2,123.51 × 635.72
  4. Step 4: Simplify right side
    1,415.18x = 1,349,943.98
  5. Step 5: Solve for x
    x = 1,349,943.98/1,415.18
  6. Step 6: Final answer
    x = 953.90

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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.