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Finding the Fourth Proportional to 315,541.20, 473,081.40 and 128,456.40

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Solution

The fourth proportional to 315,541.20, 473,081.40 and 128,456.40 is: 192,590.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,541.20 : 473,081.40 = 128,456.40 : x
  2. Step 2: Convert to fraction form
    315,541.20/473,081.40 = 128,456.40/x
  3. Step 3: Cross multiply
    315,541.20x = 473,081.40 × 128,456.40
  4. Step 4: Simplify right side
    315,541.20x = 60,770,333,550.96
  5. Step 5: Solve for x
    x = 60,770,333,550.96/315,541.20
  6. Step 6: Final answer
    x = 192,590.80

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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.