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Finding the Fourth Proportional to 1,580.46, 2,370.33 and 426.30

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Solution

The fourth proportional to 1,580.46, 2,370.33 and 426.30 is: 639.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.46 : 2,370.33 = 426.30 : x
  2. Step 2: Convert to fraction form
    1,580.46/2,370.33 = 426.30/x
  3. Step 3: Cross multiply
    1,580.46x = 2,370.33 × 426.30
  4. Step 4: Simplify right side
    1,580.46x = 1,010,471.68
  5. Step 5: Solve for x
    x = 1,010,471.68/1,580.46
  6. Step 6: Final answer
    x = 639.35

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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.