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Finding the Fourth Proportional to 352,002.40, 528,003.60 and 85,760.80

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Solution

The fourth proportional to 352,002.40, 528,003.60 and 85,760.80 is: 128,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,002.40 : 528,003.60 = 85,760.80 : x
  2. Step 2: Convert to fraction form
    352,002.40/528,003.60 = 85,760.80/x
  3. Step 3: Cross multiply
    352,002.40x = 528,003.60 × 85,760.80
  4. Step 4: Simplify right side
    352,002.40x = 45,282,011,138.88
  5. Step 5: Solve for x
    x = 45,282,011,138.88/352,002.40
  6. Step 6: Final answer
    x = 128,641.20

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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.