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Finding the Fourth Proportional to 518,844.96, 715,942.34 and 289,348.46

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Solution

The fourth proportional to 518,844.96, 715,942.34 and 289,348.46 is: 399,265.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,844.96 : 715,942.34 = 289,348.46 : x
  2. Step 2: Convert to fraction form
    518,844.96/715,942.34 = 289,348.46/x
  3. Step 3: Cross multiply
    518,844.96x = 715,942.34 × 289,348.46
  4. Step 4: Simplify right side
    518,844.96x = 207,156,813,527.80
  5. Step 5: Solve for x
    x = 207,156,813,527.80/518,844.96
  6. Step 6: Final answer
    x = 399,265.35

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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.