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Finding the Fourth Proportional to 253,831.59, 380,752.83 and 85,357.26

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Solution

The fourth proportional to 253,831.59, 380,752.83 and 85,357.26 is: 128,037.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,831.59 : 380,752.83 = 85,357.26 : x
  2. Step 2: Convert to fraction form
    253,831.59/380,752.83 = 85,357.26/x
  3. Step 3: Cross multiply
    253,831.59x = 380,752.83 × 85,357.26
  4. Step 4: Simplify right side
    253,831.59x = 32,500,018,306.05
  5. Step 5: Solve for x
    x = 32,500,018,306.05/253,831.59
  6. Step 6: Final answer
    x = 128,037.72

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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.