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Finding the Fourth Proportional to 423,139.30, 634,866.95 and 170,491.46

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Solution

The fourth proportional to 423,139.30, 634,866.95 and 170,491.46 is: 255,800.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,139.30 : 634,866.95 = 170,491.46 : x
  2. Step 2: Convert to fraction form
    423,139.30/634,866.95 = 170,491.46/x
  3. Step 3: Cross multiply
    423,139.30x = 634,866.95 × 170,491.46
  4. Step 4: Simplify right side
    423,139.30x = 108,239,392,358.79
  5. Step 5: Solve for x
    x = 108,239,392,358.79/423,139.30
  6. Step 6: Final answer
    x = 255,800.85

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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.