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Finding the Fourth Proportional to 326,897.85, 490,374.98 and 90,240.55

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Solution

The fourth proportional to 326,897.85, 490,374.98 and 90,240.55 is: 135,368.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,897.85 : 490,374.98 = 90,240.55 : x
  2. Step 2: Convert to fraction form
    326,897.85/490,374.98 = 90,240.55/x
  3. Step 3: Cross multiply
    326,897.85x = 490,374.98 × 90,240.55
  4. Step 4: Simplify right side
    326,897.85x = 44,251,708,127.04
  5. Step 5: Solve for x
    x = 44,251,708,127.04/326,897.85
  6. Step 6: Final answer
    x = 135,368.61

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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.