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Finding the Fourth Proportional to 425,497.80, 638,246.70 and 188,864.40

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Solution

The fourth proportional to 425,497.80, 638,246.70 and 188,864.40 is: 283,296.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,497.80 : 638,246.70 = 188,864.40 : x
  2. Step 2: Convert to fraction form
    425,497.80/638,246.70 = 188,864.40/x
  3. Step 3: Cross multiply
    425,497.80x = 638,246.70 × 188,864.40
  4. Step 4: Simplify right side
    425,497.80x = 120,542,080,047.48
  5. Step 5: Solve for x
    x = 120,542,080,047.48/425,497.80
  6. Step 6: Final answer
    x = 283,296.60

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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.