Home / 920,135.10-1,380,202.65-636,699.90

Finding the Fourth Proportional to 920,135.10, 1,380,202.65 and 636,699.90

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Solution

The fourth proportional to 920,135.10, 1,380,202.65 and 636,699.90 is: 955,049.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,135.10 : 1,380,202.65 = 636,699.90 : x
  2. Step 2: Convert to fraction form
    920,135.10/1,380,202.65 = 636,699.90/x
  3. Step 3: Cross multiply
    920,135.10x = 1,380,202.65 × 636,699.90
  4. Step 4: Simplify right side
    920,135.10x = 878,774,889,234.74
  5. Step 5: Solve for x
    x = 878,774,889,234.74/920,135.10
  6. Step 6: Final answer
    x = 955,049.85

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Half scale
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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.