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Finding the Fourth Proportional to 390,494.11, 585,754.06 and 134,324.11

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Solution

The fourth proportional to 390,494.11, 585,754.06 and 134,324.11 is: 201,490.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,494.11 : 585,754.06 = 134,324.11 : x
  2. Step 2: Convert to fraction form
    390,494.11/585,754.06 = 134,324.11/x
  3. Step 3: Cross multiply
    390,494.11x = 585,754.06 × 134,324.11
  4. Step 4: Simplify right side
    390,494.11x = 78,680,893,058.84
  5. Step 5: Solve for x
    x = 78,680,893,058.84/390,494.11
  6. Step 6: Final answer
    x = 201,490.60

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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.