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Finding the Fourth Proportional to 253,782.10, 380,679.23 and 85,308.18

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Solution

The fourth proportional to 253,782.10, 380,679.23 and 85,308.18 is: 127,964.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,782.10 : 380,679.23 = 85,308.18 : x
  2. Step 2: Convert to fraction form
    253,782.10/380,679.23 = 85,308.18/x
  3. Step 3: Cross multiply
    253,782.10x = 380,679.23 × 85,308.18
  4. Step 4: Simplify right side
    253,782.10x = 32,475,052,275.10
  5. Step 5: Solve for x
    x = 32,475,052,275.10/253,782.10
  6. Step 6: Final answer
    x = 127,964.31

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1.5x scale

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.