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Finding the Fourth Proportional to 1,077.30, 1,486.75 and 635.55

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Solution

The fourth proportional to 1,077.30, 1,486.75 and 635.55 is: 877.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.30 : 1,486.75 = 635.55 : x
  2. Step 2: Convert to fraction form
    1,077.30/1,486.75 = 635.55/x
  3. Step 3: Cross multiply
    1,077.30x = 1,486.75 × 635.55
  4. Step 4: Simplify right side
    1,077.30x = 944,903.96
  5. Step 5: Solve for x
    x = 944,903.96/1,077.30
  6. Step 6: Final answer
    x = 877.10

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1.5x scale

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.