Home / 1,276.86-1,913.69-545.58

Finding the Fourth Proportional to 1,276.86, 1,913.69 and 545.58

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Solution

The fourth proportional to 1,276.86, 1,913.69 and 545.58 is: 817.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.86 : 1,913.69 = 545.58 : x
  2. Step 2: Convert to fraction form
    1,276.86/1,913.69 = 545.58/x
  3. Step 3: Cross multiply
    1,276.86x = 1,913.69 × 545.58
  4. Step 4: Simplify right side
    1,276.86x = 1,044,070.99
  5. Step 5: Solve for x
    x = 1,044,070.99/1,276.86
  6. Step 6: Final answer
    x = 817.69

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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.