Home / 768,049.20-1,152,073.80-390,135.60

Finding the Fourth Proportional to 768,049.20, 1,152,073.80 and 390,135.60

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Solution

The fourth proportional to 768,049.20, 1,152,073.80 and 390,135.60 is: 585,203.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,049.20 : 1,152,073.80 = 390,135.60 : x
  2. Step 2: Convert to fraction form
    768,049.20/1,152,073.80 = 390,135.60/x
  3. Step 3: Cross multiply
    768,049.20x = 1,152,073.80 × 390,135.60
  4. Step 4: Simplify right side
    768,049.20x = 449,465,003,207.28
  5. Step 5: Solve for x
    x = 449,465,003,207.28/768,049.20
  6. Step 6: Final answer
    x = 585,203.40

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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.