Home / 1,278.59-1,917.37-498.48

Finding the Fourth Proportional to 1,278.59, 1,917.37 and 498.48

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Solution

The fourth proportional to 1,278.59, 1,917.37 and 498.48 is: 747.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.59 : 1,917.37 = 498.48 : x
  2. Step 2: Convert to fraction form
    1,278.59/1,917.37 = 498.48/x
  3. Step 3: Cross multiply
    1,278.59x = 1,917.37 × 498.48
  4. Step 4: Simplify right side
    1,278.59x = 955,762.16
  5. Step 5: Solve for x
    x = 955,762.16/1,278.59
  6. Step 6: Final answer
    x = 747.52

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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.