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Finding the Fourth Proportional to 638,952.40, 958,428.60 and 195,720.40

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Solution

The fourth proportional to 638,952.40, 958,428.60 and 195,720.40 is: 293,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,952.40 : 958,428.60 = 195,720.40 : x
  2. Step 2: Convert to fraction form
    638,952.40/958,428.60 = 195,720.40/x
  3. Step 3: Cross multiply
    638,952.40x = 958,428.60 × 195,720.40
  4. Step 4: Simplify right side
    638,952.40x = 187,584,028,963.44
  5. Step 5: Solve for x
    x = 187,584,028,963.44/638,952.40
  6. Step 6: Final answer
    x = 293,580.60

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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.