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Finding the Fourth Proportional to 320,000.80, 480,001.20 and 315,335.20

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Solution

The fourth proportional to 320,000.80, 480,001.20 and 315,335.20 is: 473,002.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,000.80 : 480,001.20 = 315,335.20 : x
  2. Step 2: Convert to fraction form
    320,000.80/480,001.20 = 315,335.20/x
  3. Step 3: Cross multiply
    320,000.80x = 480,001.20 × 315,335.20
  4. Step 4: Simplify right side
    320,000.80x = 151,361,274,402.24
  5. Step 5: Solve for x
    x = 151,361,274,402.24/320,000.80
  6. Step 6: Final answer
    x = 473,002.80

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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.