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Finding the Fourth Proportional to 312,614.65, 431,402.56 and 176,645.67

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Solution

The fourth proportional to 312,614.65, 431,402.56 and 176,645.67 is: 243,767.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,614.65 : 431,402.56 = 176,645.67 : x
  2. Step 2: Convert to fraction form
    312,614.65/431,402.56 = 176,645.67/x
  3. Step 3: Cross multiply
    312,614.65x = 431,402.56 × 176,645.67
  4. Step 4: Simplify right side
    312,614.65x = 76,205,395,611.81
  5. Step 5: Solve for x
    x = 76,205,395,611.81/312,614.65
  6. Step 6: Final answer
    x = 243,767.83

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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.