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Finding the Fourth Proportional to 315,947.70, 473,921.55 and 138,266.10

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Solution

The fourth proportional to 315,947.70, 473,921.55 and 138,266.10 is: 207,399.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,947.70 : 473,921.55 = 138,266.10 : x
  2. Step 2: Convert to fraction form
    315,947.70/473,921.55 = 138,266.10/x
  3. Step 3: Cross multiply
    315,947.70x = 473,921.55 × 138,266.10
  4. Step 4: Simplify right side
    315,947.70x = 65,527,284,424.46
  5. Step 5: Solve for x
    x = 65,527,284,424.46/315,947.70
  6. Step 6: Final answer
    x = 207,399.15

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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.