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Finding the Fourth Proportional to 315,728.72, 473,593.08 and 128,754.80

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Solution

The fourth proportional to 315,728.72, 473,593.08 and 128,754.80 is: 193,132.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,728.72 : 473,593.08 = 128,754.80 : x
  2. Step 2: Convert to fraction form
    315,728.72/473,593.08 = 128,754.80/x
  3. Step 3: Cross multiply
    315,728.72x = 473,593.08 × 128,754.80
  4. Step 4: Simplify right side
    315,728.72x = 60,977,382,296.78
  5. Step 5: Solve for x
    x = 60,977,382,296.78/315,728.72
  6. Step 6: Final answer
    x = 193,132.20

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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.