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Finding the Fourth Proportional to 548,139.40, 822,209.10 and 423,723.40

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Solution

The fourth proportional to 548,139.40, 822,209.10 and 423,723.40 is: 635,585.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,139.40 : 822,209.10 = 423,723.40 : x
  2. Step 2: Convert to fraction form
    548,139.40/822,209.10 = 423,723.40/x
  3. Step 3: Cross multiply
    548,139.40x = 822,209.10 × 423,723.40
  4. Step 4: Simplify right side
    548,139.40x = 348,389,235,362.94
  5. Step 5: Solve for x
    x = 348,389,235,362.94/548,139.40
  6. Step 6: Final answer
    x = 635,585.10

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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.