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Finding the Fourth Proportional to 518,998.20, 716,222.70 and 304,265.40

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Solution

The fourth proportional to 518,998.20, 716,222.70 and 304,265.40 is: 419,889.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,998.20 : 716,222.70 = 304,265.40 : x
  2. Step 2: Convert to fraction form
    518,998.20/716,222.70 = 304,265.40/x
  3. Step 3: Cross multiply
    518,998.20x = 716,222.70 × 304,265.40
  4. Step 4: Simplify right side
    518,998.20x = 217,921,786,304.58
  5. Step 5: Solve for x
    x = 217,921,786,304.58/518,998.20
  6. Step 6: Final answer
    x = 419,889.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.