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Finding the Fourth Proportional to 312,568.96, 431,347.20 and 169,328.88

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Solution

The fourth proportional to 312,568.96, 431,347.20 and 169,328.88 is: 233,674.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,568.96 : 431,347.20 = 169,328.88 : x
  2. Step 2: Convert to fraction form
    312,568.96/431,347.20 = 169,328.88/x
  3. Step 3: Cross multiply
    312,568.96x = 431,347.20 × 169,328.88
  4. Step 4: Simplify right side
    312,568.96x = 73,039,538,267.14
  5. Step 5: Solve for x
    x = 73,039,538,267.14/312,568.96
  6. Step 6: Final answer
    x = 233,674.96

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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.