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Finding the Fourth Proportional to 987,408.80, 1,480,954.80 and 355,997.60

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Solution

The fourth proportional to 987,408.80, 1,480,954.80 and 355,997.60 is: 533,939.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,408.80 : 1,480,954.80 = 355,997.60 : x
  2. Step 2: Convert to fraction form
    987,408.80/1,480,954.80 = 355,997.60/x
  3. Step 3: Cross multiply
    987,408.80x = 1,480,954.80 × 355,997.60
  4. Step 4: Simplify right side
    987,408.80x = 527,216,354,508.48
  5. Step 5: Solve for x
    x = 527,216,354,508.48/987,408.80
  6. Step 6: Final answer
    x = 533,939.29

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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.