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Finding the Fourth Proportional to 328,298.65, 492,106.55 and 138,600.70

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Solution

The fourth proportional to 328,298.65, 492,106.55 and 138,600.70 is: 207,756.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,298.65 : 492,106.55 = 138,600.70 : x
  2. Step 2: Convert to fraction form
    328,298.65/492,106.55 = 138,600.70/x
  3. Step 3: Cross multiply
    328,298.65x = 492,106.55 × 138,600.70
  4. Step 4: Simplify right side
    328,298.65x = 68,206,312,304.59
  5. Step 5: Solve for x
    x = 68,206,312,304.59/328,298.65
  6. Step 6: Final answer
    x = 207,756.91

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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.