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Finding the Fourth Proportional to 780,151.20, 1,169,305.20 and 330,871.20

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Solution

The fourth proportional to 780,151.20, 1,169,305.20 and 330,871.20 is: 495,915.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,151.20 : 1,169,305.20 = 330,871.20 : x
  2. Step 2: Convert to fraction form
    780,151.20/1,169,305.20 = 330,871.20/x
  3. Step 3: Cross multiply
    780,151.20x = 1,169,305.20 × 330,871.20
  4. Step 4: Simplify right side
    780,151.20x = 386,889,414,690.24
  5. Step 5: Solve for x
    x = 386,889,414,690.24/780,151.20
  6. Step 6: Final answer
    x = 495,915.94

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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.