Home / 920,108.40-1,380,162.60-289,021.20

Finding the Fourth Proportional to 920,108.40, 1,380,162.60 and 289,021.20

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Solution

The fourth proportional to 920,108.40, 1,380,162.60 and 289,021.20 is: 433,531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,108.40 : 1,380,162.60 = 289,021.20 : x
  2. Step 2: Convert to fraction form
    920,108.40/1,380,162.60 = 289,021.20/x
  3. Step 3: Cross multiply
    920,108.40x = 1,380,162.60 × 289,021.20
  4. Step 4: Simplify right side
    920,108.40x = 398,896,250,847.12
  5. Step 5: Solve for x
    x = 398,896,250,847.12/920,108.40
  6. Step 6: Final answer
    x = 433,531.80

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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.