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Finding the Fourth Proportional to 912,114, 1,368,392.45 and 281,027.79

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Solution

The fourth proportional to 912,114, 1,368,392.45 and 281,027.79 is: 421,609.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,114 : 1,368,392.45 = 281,027.79 : x
  2. Step 2: Convert to fraction form
    912,114/1,368,392.45 = 281,027.79/x
  3. Step 3: Cross multiply
    912,114x = 1,368,392.45 × 281,027.79
  4. Step 4: Simplify right side
    912,114x = 384,556,304,671.05
  5. Step 5: Solve for x
    x = 384,556,304,671.05/912,114
  6. Step 6: Final answer
    x = 421,609.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.