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Finding the Fourth Proportional to 310,213.80, 465,320.70 and 85,608.90

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Solution

The fourth proportional to 310,213.80, 465,320.70 and 85,608.90 is: 128,413.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,213.80 : 465,320.70 = 85,608.90 : x
  2. Step 2: Convert to fraction form
    310,213.80/465,320.70 = 85,608.90/x
  3. Step 3: Cross multiply
    310,213.80x = 465,320.70 × 85,608.90
  4. Step 4: Simplify right side
    310,213.80x = 39,835,593,274.23
  5. Step 5: Solve for x
    x = 39,835,593,274.23/310,213.80
  6. Step 6: Final answer
    x = 128,413.35

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Similar ratio
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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.