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Finding the Fourth Proportional to 312,551.19, 431,320.24 and 169,311.80

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Solution

The fourth proportional to 312,551.19, 431,320.24 and 169,311.80 is: 233,650.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,551.19 : 431,320.24 = 169,311.80 : x
  2. Step 2: Convert to fraction form
    312,551.19/431,320.24 = 169,311.80/x
  3. Step 3: Cross multiply
    312,551.19x = 431,320.24 × 169,311.80
  4. Step 4: Simplify right side
    312,551.19x = 73,027,607,500.77
  5. Step 5: Solve for x
    x = 73,027,607,500.77/312,551.19
  6. Step 6: Final answer
    x = 233,650.07

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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.