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Finding the Fourth Proportional to 312,372.57, 431,074.35 and 169,132.71

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Solution

The fourth proportional to 312,372.57, 431,074.35 and 169,132.71 is: 233,403.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,372.57 : 431,074.35 = 169,132.71 : x
  2. Step 2: Convert to fraction form
    312,372.57/431,074.35 = 169,132.71/x
  3. Step 3: Cross multiply
    312,372.57x = 431,074.35 × 169,132.71
  4. Step 4: Simplify right side
    312,372.57x = 72,908,773,026.99
  5. Step 5: Solve for x
    x = 72,908,773,026.99/312,372.57
  6. Step 6: Final answer
    x = 233,403.25

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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.