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Finding the Fourth Proportional to 613,341.80, 920,012.70 and 192,660.20

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Solution

The fourth proportional to 613,341.80, 920,012.70 and 192,660.20 is: 288,990.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,341.80 : 920,012.70 = 192,660.20 : x
  2. Step 2: Convert to fraction form
    613,341.80/920,012.70 = 192,660.20/x
  3. Step 3: Cross multiply
    613,341.80x = 920,012.70 × 192,660.20
  4. Step 4: Simplify right side
    613,341.80x = 177,249,830,784.54
  5. Step 5: Solve for x
    x = 177,249,830,784.54/613,341.80
  6. Step 6: Final answer
    x = 288,990.30

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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.