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Finding the Fourth Proportional to 1,415.71, 2,123.30 and 635.73

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Solution

The fourth proportional to 1,415.71, 2,123.30 and 635.73 is: 953.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.71 : 2,123.30 = 635.73 : x
  2. Step 2: Convert to fraction form
    1,415.71/2,123.30 = 635.73/x
  3. Step 3: Cross multiply
    1,415.71x = 2,123.30 × 635.73
  4. Step 4: Simplify right side
    1,415.71x = 1,349,845.51
  5. Step 5: Solve for x
    x = 1,349,845.51/1,415.71
  6. Step 6: Final answer
    x = 953.48

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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.