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Finding the Fourth Proportional to 315,563.20, 473,114.40 and 128,478.40

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Solution

The fourth proportional to 315,563.20, 473,114.40 and 128,478.40 is: 192,623.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,563.20 : 473,114.40 = 128,478.40 : x
  2. Step 2: Convert to fraction form
    315,563.20/473,114.40 = 128,478.40/x
  3. Step 3: Cross multiply
    315,563.20x = 473,114.40 × 128,478.40
  4. Step 4: Simplify right side
    315,563.20x = 60,784,981,128.96
  5. Step 5: Solve for x
    x = 60,784,981,128.96/315,563.20
  6. Step 6: Final answer
    x = 192,623.79

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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.