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Finding the Fourth Proportional to 281,894.59, 389,018.33 and 154,569.88

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Solution

The fourth proportional to 281,894.59, 389,018.33 and 154,569.88 is: 213,308.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,894.59 : 389,018.33 = 154,569.88 : x
  2. Step 2: Convert to fraction form
    281,894.59/389,018.33 = 154,569.88/x
  3. Step 3: Cross multiply
    281,894.59x = 389,018.33 × 154,569.88
  4. Step 4: Simplify right side
    281,894.59x = 60,130,516,585.90
  5. Step 5: Solve for x
    x = 60,130,516,585.90/281,894.59
  6. Step 6: Final answer
    x = 213,308.52

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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.