Home / 920,612.20-1,380,918.30-289,719.40

Finding the Fourth Proportional to 920,612.20, 1,380,918.30 and 289,719.40

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Solution

The fourth proportional to 920,612.20, 1,380,918.30 and 289,719.40 is: 434,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,612.20 : 1,380,918.30 = 289,719.40 : x
  2. Step 2: Convert to fraction form
    920,612.20/1,380,918.30 = 289,719.40/x
  3. Step 3: Cross multiply
    920,612.20x = 1,380,918.30 × 289,719.40
  4. Step 4: Simplify right side
    920,612.20x = 400,078,821,325.02
  5. Step 5: Solve for x
    x = 400,078,821,325.02/920,612.20
  6. Step 6: Final answer
    x = 434,579.10

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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.