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Finding the Fourth Proportional to 423,157.77, 634,729.92 and 170,432.31

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Solution

The fourth proportional to 423,157.77, 634,729.92 and 170,432.31 is: 255,645.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,157.77 : 634,729.92 = 170,432.31 : x
  2. Step 2: Convert to fraction form
    423,157.77/634,729.92 = 170,432.31/x
  3. Step 3: Cross multiply
    423,157.77x = 634,729.92 × 170,432.31
  4. Step 4: Simplify right side
    423,157.77x = 108,178,486,491.72
  5. Step 5: Solve for x
    x = 108,178,486,491.72/423,157.77
  6. Step 6: Final answer
    x = 255,645.75

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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.