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Finding the Fourth Proportional to 286,002.21, 394,730.15 and 158,718.81

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Solution

The fourth proportional to 286,002.21, 394,730.15 and 158,718.81 is: 219,058.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,002.21 : 394,730.15 = 158,718.81 : x
  2. Step 2: Convert to fraction form
    286,002.21/394,730.15 = 158,718.81/x
  3. Step 3: Cross multiply
    286,002.21x = 394,730.15 × 158,718.81
  4. Step 4: Simplify right side
    286,002.21x = 62,651,098,885.53
  5. Step 5: Solve for x
    x = 62,651,098,885.53/286,002.21
  6. Step 6: Final answer
    x = 219,058.09

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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.