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Finding the Fourth Proportional to 442,916.40, 664,266.60 and 127,340.40

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Solution

The fourth proportional to 442,916.40, 664,266.60 and 127,340.40 is: 190,979.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,916.40 : 664,266.60 = 127,340.40 : x
  2. Step 2: Convert to fraction form
    442,916.40/664,266.60 = 127,340.40/x
  3. Step 3: Cross multiply
    442,916.40x = 664,266.60 × 127,340.40
  4. Step 4: Simplify right side
    442,916.40x = 84,587,974,550.64
  5. Step 5: Solve for x
    x = 84,587,974,550.64/442,916.40
  6. Step 6: Final answer
    x = 190,979.55

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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.