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Finding the Fourth Proportional to 1,077.37, 1,486.75 and 635.31

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Solution

The fourth proportional to 1,077.37, 1,486.75 and 635.31 is: 876.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.37 : 1,486.75 = 635.31 : x
  2. Step 2: Convert to fraction form
    1,077.37/1,486.75 = 635.31/x
  3. Step 3: Cross multiply
    1,077.37x = 1,486.75 × 635.31
  4. Step 4: Simplify right side
    1,077.37x = 944,547.14
  5. Step 5: Solve for x
    x = 944,547.14/1,077.37
  6. Step 6: Final answer
    x = 876.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.