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Finding the Fourth Proportional to 518,278.16, 714,979.50 and 303,286.34

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Solution

The fourth proportional to 518,278.16, 714,979.50 and 303,286.34 is: 418,392.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,278.16 : 714,979.50 = 303,286.34 : x
  2. Step 2: Convert to fraction form
    518,278.16/714,979.50 = 303,286.34/x
  3. Step 3: Cross multiply
    518,278.16x = 714,979.50 × 303,286.34
  4. Step 4: Simplify right side
    518,278.16x = 216,843,515,730.03
  5. Step 5: Solve for x
    x = 216,843,515,730.03/518,278.16
  6. Step 6: Final answer
    x = 418,392.15

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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.