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Finding the Fourth Proportional to 311,807.39, 430,306.76 and 173,998.37

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Solution

The fourth proportional to 311,807.39, 430,306.76 and 173,998.37 is: 240,124.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,807.39 : 430,306.76 = 173,998.37 : x
  2. Step 2: Convert to fraction form
    311,807.39/430,306.76 = 173,998.37/x
  3. Step 3: Cross multiply
    311,807.39x = 430,306.76 × 173,998.37
  4. Step 4: Simplify right side
    311,807.39x = 74,872,676,350.74
  5. Step 5: Solve for x
    x = 74,872,676,350.74/311,807.39
  6. Step 6: Final answer
    x = 240,124.77

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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.