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Finding the Fourth Proportional to 398,000.80, 597,001.20 and 131,802.40

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Solution

The fourth proportional to 398,000.80, 597,001.20 and 131,802.40 is: 197,703.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,000.80 : 597,001.20 = 131,802.40 : x
  2. Step 2: Convert to fraction form
    398,000.80/597,001.20 = 131,802.40/x
  3. Step 3: Cross multiply
    398,000.80x = 597,001.20 × 131,802.40
  4. Step 4: Simplify right side
    398,000.80x = 78,686,190,962.88
  5. Step 5: Solve for x
    x = 78,686,190,962.88/398,000.80
  6. Step 6: Final answer
    x = 197,703.60

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Similar ratio
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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.