Home / 648,001.20-972,001.80-381,624.60

Finding the Fourth Proportional to 648,001.20, 972,001.80 and 381,624.60

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Solution

The fourth proportional to 648,001.20, 972,001.80 and 381,624.60 is: 572,436.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,001.20 : 972,001.80 = 381,624.60 : x
  2. Step 2: Convert to fraction form
    648,001.20/972,001.80 = 381,624.60/x
  3. Step 3: Cross multiply
    648,001.20x = 972,001.80 × 381,624.60
  4. Step 4: Simplify right side
    648,001.20x = 370,939,798,124.28
  5. Step 5: Solve for x
    x = 370,939,798,124.28/648,001.20
  6. Step 6: Final answer
    x = 572,436.90

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Double scale
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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.