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Finding the Fourth Proportional to 326,987.16, 490,605.28 and 113,778.76

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Solution

The fourth proportional to 326,987.16, 490,605.28 and 113,778.76 is: 170,711.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,987.16 : 490,605.28 = 113,778.76 : x
  2. Step 2: Convert to fraction form
    326,987.16/490,605.28 = 113,778.76/x
  3. Step 3: Cross multiply
    326,987.16x = 490,605.28 × 113,778.76
  4. Step 4: Simplify right side
    326,987.16x = 55,820,460,407.85
  5. Step 5: Solve for x
    x = 55,820,460,407.85/326,987.16
  6. Step 6: Final answer
    x = 170,711.48

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1.5x scale

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.