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Finding the Fourth Proportional to 253,649.19, 380,490.19 and 85,162.71

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Solution

The fourth proportional to 253,649.19, 380,490.19 and 85,162.71 is: 127,749.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,649.19 : 380,490.19 = 85,162.71 : x
  2. Step 2: Convert to fraction form
    253,649.19/380,490.19 = 85,162.71/x
  3. Step 3: Cross multiply
    253,649.19x = 380,490.19 × 85,162.71
  4. Step 4: Simplify right side
    253,649.19x = 32,403,575,708.81
  5. Step 5: Solve for x
    x = 32,403,575,708.81/253,649.19
  6. Step 6: Final answer
    x = 127,749.57

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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.