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Finding the Fourth Proportional to 1,057.74, 1,580.16 and 841.56

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Solution

The fourth proportional to 1,057.74, 1,580.16 and 841.56 is: 1,257.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.74 : 1,580.16 = 841.56 : x
  2. Step 2: Convert to fraction form
    1,057.74/1,580.16 = 841.56/x
  3. Step 3: Cross multiply
    1,057.74x = 1,580.16 × 841.56
  4. Step 4: Simplify right side
    1,057.74x = 1,329,799.45
  5. Step 5: Solve for x
    x = 1,329,799.45/1,057.74
  6. Step 6: Final answer
    x = 1,257.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.