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Finding the Fourth Proportional to 308,894.60, 426,325.55 and 212,018.87

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Solution

The fourth proportional to 308,894.60, 426,325.55 and 212,018.87 is: 292,621.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,894.60 : 426,325.55 = 212,018.87 : x
  2. Step 2: Convert to fraction form
    308,894.60/426,325.55 = 212,018.87/x
  3. Step 3: Cross multiply
    308,894.60x = 426,325.55 × 212,018.87
  4. Step 4: Simplify right side
    308,894.60x = 90,389,058,171.41
  5. Step 5: Solve for x
    x = 90,389,058,171.41/308,894.60
  6. Step 6: Final answer
    x = 292,621.04

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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.