Home / 920,138.60-1,380,207.90-636,703.40

Finding the Fourth Proportional to 920,138.60, 1,380,207.90 and 636,703.40

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Solution

The fourth proportional to 920,138.60, 1,380,207.90 and 636,703.40 is: 955,055.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,138.60 : 1,380,207.90 = 636,703.40 : x
  2. Step 2: Convert to fraction form
    920,138.60/1,380,207.90 = 636,703.40/x
  3. Step 3: Cross multiply
    920,138.60x = 1,380,207.90 × 636,703.40
  4. Step 4: Simplify right side
    920,138.60x = 878,783,062,636.86
  5. Step 5: Solve for x
    x = 878,783,062,636.86/920,138.60
  6. Step 6: Final answer
    x = 955,055.10

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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.