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Finding the Fourth Proportional to 511,993.20, 767,989.80 and 325,215.60

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Solution

The fourth proportional to 511,993.20, 767,989.80 and 325,215.60 is: 487,823.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,993.20 : 767,989.80 = 325,215.60 : x
  2. Step 2: Convert to fraction form
    511,993.20/767,989.80 = 325,215.60/x
  3. Step 3: Cross multiply
    511,993.20x = 767,989.80 × 325,215.60
  4. Step 4: Simplify right side
    511,993.20x = 249,762,263,600.88
  5. Step 5: Solve for x
    x = 249,762,263,600.88/511,993.20
  6. Step 6: Final answer
    x = 487,823.40

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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.