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Finding the Fourth Proportional to 518,643.20, 777,964.80 and 124,659.20

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Solution

The fourth proportional to 518,643.20, 777,964.80 and 124,659.20 is: 186,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,643.20 : 777,964.80 = 124,659.20 : x
  2. Step 2: Convert to fraction form
    518,643.20/777,964.80 = 124,659.20/x
  3. Step 3: Cross multiply
    518,643.20x = 777,964.80 × 124,659.20
  4. Step 4: Simplify right side
    518,643.20x = 96,980,469,596.16
  5. Step 5: Solve for x
    x = 96,980,469,596.16/518,643.20
  6. Step 6: Final answer
    x = 186,988.80

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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.