Home / 2,478.76-3,421.38-1,431.24

Finding the Fourth Proportional to 2,478.76, 3,421.38 and 1,431.24

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Solution

The fourth proportional to 2,478.76, 3,421.38 and 1,431.24 is: 1,975.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.76 : 3,421.38 = 1,431.24 : x
  2. Step 2: Convert to fraction form
    2,478.76/3,421.38 = 1,431.24/x
  3. Step 3: Cross multiply
    2,478.76x = 3,421.38 × 1,431.24
  4. Step 4: Simplify right side
    2,478.76x = 4,896,815.91
  5. Step 5: Solve for x
    x = 4,896,815.91/2,478.76
  6. Step 6: Final answer
    x = 1,975.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.