Home / 1,275.16-1,913.28-545.26

Finding the Fourth Proportional to 1,275.16, 1,913.28 and 545.26

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Solution

The fourth proportional to 1,275.16, 1,913.28 and 545.26 is: 818.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.16 : 1,913.28 = 545.26 : x
  2. Step 2: Convert to fraction form
    1,275.16/1,913.28 = 545.26/x
  3. Step 3: Cross multiply
    1,275.16x = 1,913.28 × 545.26
  4. Step 4: Simplify right side
    1,275.16x = 1,043,235.05
  5. Step 5: Solve for x
    x = 1,043,235.05/1,275.16
  6. Step 6: Final answer
    x = 818.12

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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.