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Finding the Fourth Proportional to 324,000.40, 486,000.60 and 205,319.20

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Solution

The fourth proportional to 324,000.40, 486,000.60 and 205,319.20 is: 307,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,000.40 : 486,000.60 = 205,319.20 : x
  2. Step 2: Convert to fraction form
    324,000.40/486,000.60 = 205,319.20/x
  3. Step 3: Cross multiply
    324,000.40x = 486,000.60 × 205,319.20
  4. Step 4: Simplify right side
    324,000.40x = 99,785,254,391.52
  5. Step 5: Solve for x
    x = 99,785,254,391.52/324,000.40
  6. Step 6: Final answer
    x = 307,978.80

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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.