Home / 388,921.50-536,711.67-219,161.70

Finding the Fourth Proportional to 388,921.50, 536,711.67 and 219,161.70

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Solution

The fourth proportional to 388,921.50, 536,711.67 and 219,161.70 is: 302,443.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,921.50 : 536,711.67 = 219,161.70 : x
  2. Step 2: Convert to fraction form
    388,921.50/536,711.67 = 219,161.70/x
  3. Step 3: Cross multiply
    388,921.50x = 536,711.67 × 219,161.70
  4. Step 4: Simplify right side
    388,921.50x = 117,626,642,007.04
  5. Step 5: Solve for x
    x = 117,626,642,007.04/388,921.50
  6. Step 6: Final answer
    x = 302,443.15

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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.