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Finding the Fourth Proportional to 315,633.60, 473,047.20 and 128,433.60

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Solution

The fourth proportional to 315,633.60, 473,047.20 and 128,433.60 is: 192,486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,633.60 : 473,047.20 = 128,433.60 : x
  2. Step 2: Convert to fraction form
    315,633.60/473,047.20 = 128,433.60/x
  3. Step 3: Cross multiply
    315,633.60x = 473,047.20 × 128,433.60
  4. Step 4: Simplify right side
    315,633.60x = 60,755,154,865.92
  5. Step 5: Solve for x
    x = 60,755,154,865.92/315,633.60
  6. Step 6: Final answer
    x = 192,486.33

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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.