Home / 1,417.28-2,124.12-636.45

Finding the Fourth Proportional to 1,417.28, 2,124.12 and 636.45

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Solution

The fourth proportional to 1,417.28, 2,124.12 and 636.45 is: 953.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.28 : 2,124.12 = 636.45 : x
  2. Step 2: Convert to fraction form
    1,417.28/2,124.12 = 636.45/x
  3. Step 3: Cross multiply
    1,417.28x = 2,124.12 × 636.45
  4. Step 4: Simplify right side
    1,417.28x = 1,351,901.05
  5. Step 5: Solve for x
    x = 1,351,901.05/1,417.28
  6. Step 6: Final answer
    x = 953.87

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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.