Home / 648,021.20-972,031.80-381,644.60

Finding the Fourth Proportional to 648,021.20, 972,031.80 and 381,644.60

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Solution

The fourth proportional to 648,021.20, 972,031.80 and 381,644.60 is: 572,466.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,021.20 : 972,031.80 = 381,644.60 : x
  2. Step 2: Convert to fraction form
    648,021.20/972,031.80 = 381,644.60/x
  3. Step 3: Cross multiply
    648,021.20x = 972,031.80 × 381,644.60
  4. Step 4: Simplify right side
    648,021.20x = 370,970,687,498.28
  5. Step 5: Solve for x
    x = 370,970,687,498.28/648,021.20
  6. Step 6: Final answer
    x = 572,466.90

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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.