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Finding the Fourth Proportional to 518,290.20, 714,996 and 303,297.21

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Solution

The fourth proportional to 518,290.20, 714,996 and 303,297.21 is: 418,407.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,290.20 : 714,996 = 303,297.21 : x
  2. Step 2: Convert to fraction form
    518,290.20/714,996 = 303,297.21/x
  3. Step 3: Cross multiply
    518,290.20x = 714,996 × 303,297.21
  4. Step 4: Simplify right side
    518,290.20x = 216,856,291,961.16
  5. Step 5: Solve for x
    x = 216,856,291,961.16/518,290.20
  6. Step 6: Final answer
    x = 418,407.09

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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.