Home / 768,043.20-1,152,064.80-390,129.60

Finding the Fourth Proportional to 768,043.20, 1,152,064.80 and 390,129.60

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Solution

The fourth proportional to 768,043.20, 1,152,064.80 and 390,129.60 is: 585,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,043.20 : 1,152,064.80 = 390,129.60 : x
  2. Step 2: Convert to fraction form
    768,043.20/1,152,064.80 = 390,129.60/x
  3. Step 3: Cross multiply
    768,043.20x = 1,152,064.80 × 390,129.60
  4. Step 4: Simplify right side
    768,043.20x = 449,454,579,598.08
  5. Step 5: Solve for x
    x = 449,454,579,598.08/768,043.20
  6. Step 6: Final answer
    x = 585,194.40

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Similar ratio
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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.