Home / 402,772.15-555,834.05-221,491.72

Finding the Fourth Proportional to 402,772.15, 555,834.05 and 221,491.72

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Solution

The fourth proportional to 402,772.15, 555,834.05 and 221,491.72 is: 305,663.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,772.15 : 555,834.05 = 221,491.72 : x
  2. Step 2: Convert to fraction form
    402,772.15/555,834.05 = 221,491.72/x
  3. Step 3: Cross multiply
    402,772.15x = 555,834.05 × 221,491.72
  4. Step 4: Simplify right side
    402,772.15x = 123,112,639,769.07
  5. Step 5: Solve for x
    x = 123,112,639,769.07/402,772.15
  6. Step 6: Final answer
    x = 305,663.24

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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.