Home / 1,276.14-1,913.58-545.30

Finding the Fourth Proportional to 1,276.14, 1,913.58 and 545.30

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Solution

The fourth proportional to 1,276.14, 1,913.58 and 545.30 is: 817.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.14 : 1,913.58 = 545.30 : x
  2. Step 2: Convert to fraction form
    1,276.14/1,913.58 = 545.30/x
  3. Step 3: Cross multiply
    1,276.14x = 1,913.58 × 545.30
  4. Step 4: Simplify right side
    1,276.14x = 1,043,475.17
  5. Step 5: Solve for x
    x = 1,043,475.17/1,276.14
  6. Step 6: Final answer
    x = 817.68

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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.