Home / 1,411.28-2,116.51-545.39

Finding the Fourth Proportional to 1,411.28, 2,116.51 and 545.39

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Solution

The fourth proportional to 1,411.28, 2,116.51 and 545.39 is: 817.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.28 : 2,116.51 = 545.39 : x
  2. Step 2: Convert to fraction form
    1,411.28/2,116.51 = 545.39/x
  3. Step 3: Cross multiply
    1,411.28x = 2,116.51 × 545.39
  4. Step 4: Simplify right side
    1,411.28x = 1,154,323.39
  5. Step 5: Solve for x
    x = 1,154,323.39/1,411.28
  6. Step 6: Final answer
    x = 817.93

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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.