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Finding the Fourth Proportional to 412,428.70, 618,643.05 and 270,711.10

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Solution

The fourth proportional to 412,428.70, 618,643.05 and 270,711.10 is: 406,066.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,428.70 : 618,643.05 = 270,711.10 : x
  2. Step 2: Convert to fraction form
    412,428.70/618,643.05 = 270,711.10/x
  3. Step 3: Cross multiply
    412,428.70x = 618,643.05 × 270,711.10
  4. Step 4: Simplify right side
    412,428.70x = 167,473,540,572.86
  5. Step 5: Solve for x
    x = 167,473,540,572.86/412,428.70
  6. Step 6: Final answer
    x = 406,066.65

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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.