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Finding the Fourth Proportional to 518,479.80, 777,623.70 and 144,425.40

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Solution

The fourth proportional to 518,479.80, 777,623.70 and 144,425.40 is: 216,611.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,479.80 : 777,623.70 = 144,425.40 : x
  2. Step 2: Convert to fraction form
    518,479.80/777,623.70 = 144,425.40/x
  3. Step 3: Cross multiply
    518,479.80x = 777,623.70 × 144,425.40
  4. Step 4: Simplify right side
    518,479.80x = 112,308,613,921.98
  5. Step 5: Solve for x
    x = 112,308,613,921.98/518,479.80
  6. Step 6: Final answer
    x = 216,611.36

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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.