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Finding the Fourth Proportional to 311,527.80, 429,908.09 and 168,287.81

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Solution

The fourth proportional to 311,527.80, 429,908.09 and 168,287.81 is: 232,237.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,527.80 : 429,908.09 = 168,287.81 : x
  2. Step 2: Convert to fraction form
    311,527.80/429,908.09 = 168,287.81/x
  3. Step 3: Cross multiply
    311,527.80x = 429,908.09 × 168,287.81
  4. Step 4: Simplify right side
    311,527.80x = 72,348,287,976.40
  5. Step 5: Solve for x
    x = 72,348,287,976.40/311,527.80
  6. Step 6: Final answer
    x = 232,237.02

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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.