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Finding the Fourth Proportional to 423,138.80, 634,866.20 and 170,490.96

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Solution

The fourth proportional to 423,138.80, 634,866.20 and 170,490.96 is: 255,800.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,138.80 : 634,866.20 = 170,490.96 : x
  2. Step 2: Convert to fraction form
    423,138.80/634,866.20 = 170,490.96/x
  3. Step 3: Cross multiply
    423,138.80x = 634,866.20 × 170,490.96
  4. Step 4: Simplify right side
    423,138.80x = 108,238,947,057.10
  5. Step 5: Solve for x
    x = 108,238,947,057.10/423,138.80
  6. Step 6: Final answer
    x = 255,800.10

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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.