Home / 1,417.45-2,125.95-686.17

Finding the Fourth Proportional to 1,417.45, 2,125.95 and 686.17

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Solution

The fourth proportional to 1,417.45, 2,125.95 and 686.17 is: 1,029.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.45 : 2,125.95 = 686.17 : x
  2. Step 2: Convert to fraction form
    1,417.45/2,125.95 = 686.17/x
  3. Step 3: Cross multiply
    1,417.45x = 2,125.95 × 686.17
  4. Step 4: Simplify right side
    1,417.45x = 1,458,763.20
  5. Step 5: Solve for x
    x = 1,458,763.20/1,417.45
  6. Step 6: Final answer
    x = 1,029.15

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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.