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Finding the Fourth Proportional to 315,292.80, 472,939.20 and 311,145.60

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Solution

The fourth proportional to 315,292.80, 472,939.20 and 311,145.60 is: 466,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,292.80 : 472,939.20 = 311,145.60 : x
  2. Step 2: Convert to fraction form
    315,292.80/472,939.20 = 311,145.60/x
  3. Step 3: Cross multiply
    315,292.80x = 472,939.20 × 311,145.60
  4. Step 4: Simplify right side
    315,292.80x = 147,152,951,147.52
  5. Step 5: Solve for x
    x = 147,152,951,147.52/315,292.80
  6. Step 6: Final answer
    x = 466,718.40

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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.