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Finding the Fourth Proportional to 342,145.80, 513,218.70 and 325,816.20

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Solution

The fourth proportional to 342,145.80, 513,218.70 and 325,816.20 is: 488,724.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,145.80 : 513,218.70 = 325,816.20 : x
  2. Step 2: Convert to fraction form
    342,145.80/513,218.70 = 325,816.20/x
  3. Step 3: Cross multiply
    342,145.80x = 513,218.70 × 325,816.20
  4. Step 4: Simplify right side
    342,145.80x = 167,214,966,602.94
  5. Step 5: Solve for x
    x = 167,214,966,602.94/342,145.80
  6. Step 6: Final answer
    x = 488,724.30

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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.