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Finding the Fourth Proportional to 1,580.54, 2,370.80 and 426.29

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Solution

The fourth proportional to 1,580.54, 2,370.80 and 426.29 is: 639.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.54 : 2,370.80 = 426.29 : x
  2. Step 2: Convert to fraction form
    1,580.54/2,370.80 = 426.29/x
  3. Step 3: Cross multiply
    1,580.54x = 2,370.80 × 426.29
  4. Step 4: Simplify right side
    1,580.54x = 1,010,637.54
  5. Step 5: Solve for x
    x = 1,010,637.54/1,580.54
  6. Step 6: Final answer
    x = 639.43

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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.