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Finding the Fourth Proportional to 1,037.17, 1,555.70 and 257.16

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Solution

The fourth proportional to 1,037.17, 1,555.70 and 257.16 is: 385.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.17 : 1,555.70 = 257.16 : x
  2. Step 2: Convert to fraction form
    1,037.17/1,555.70 = 257.16/x
  3. Step 3: Cross multiply
    1,037.17x = 1,555.70 × 257.16
  4. Step 4: Simplify right side
    1,037.17x = 400,069.32
  5. Step 5: Solve for x
    x = 400,069.32/1,037.17
  6. Step 6: Final answer
    x = 385.73

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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.