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Finding the Fourth Proportional to 512,672.80, 769,009.20 and 370,955.20

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Solution

The fourth proportional to 512,672.80, 769,009.20 and 370,955.20 is: 556,432.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,672.80 : 769,009.20 = 370,955.20 : x
  2. Step 2: Convert to fraction form
    512,672.80/769,009.20 = 370,955.20/x
  3. Step 3: Cross multiply
    512,672.80x = 769,009.20 × 370,955.20
  4. Step 4: Simplify right side
    512,672.80x = 285,267,961,587.84
  5. Step 5: Solve for x
    x = 285,267,961,587.84/512,672.80
  6. Step 6: Final answer
    x = 556,432.80

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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.