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Finding the Fourth Proportional to 1,254.17, 1,879.99 and 637.15

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Solution

The fourth proportional to 1,254.17, 1,879.99 and 637.15 is: 955.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.17 : 1,879.99 = 637.15 : x
  2. Step 2: Convert to fraction form
    1,254.17/1,879.99 = 637.15/x
  3. Step 3: Cross multiply
    1,254.17x = 1,879.99 × 637.15
  4. Step 4: Simplify right side
    1,254.17x = 1,197,835.63
  5. Step 5: Solve for x
    x = 1,197,835.63/1,254.17
  6. Step 6: Final answer
    x = 955.08

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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.