Home / 1,580.28-2,370.12-425.76

Finding the Fourth Proportional to 1,580.28, 2,370.12 and 425.76

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Solution

The fourth proportional to 1,580.28, 2,370.12 and 425.76 is: 638.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.28 : 2,370.12 = 425.76 : x
  2. Step 2: Convert to fraction form
    1,580.28/2,370.12 = 425.76/x
  3. Step 3: Cross multiply
    1,580.28x = 2,370.12 × 425.76
  4. Step 4: Simplify right side
    1,580.28x = 1,009,102.29
  5. Step 5: Solve for x
    x = 1,009,102.29/1,580.28
  6. Step 6: Final answer
    x = 638.56

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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.