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Finding the Fourth Proportional to 609,442.57, 914,319.38 and 386,388.01

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Solution

The fourth proportional to 609,442.57, 914,319.38 and 386,388.01 is: 579,680.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,442.57 : 914,319.38 = 386,388.01 : x
  2. Step 2: Convert to fraction form
    609,442.57/914,319.38 = 386,388.01/x
  3. Step 3: Cross multiply
    609,442.57x = 914,319.38 × 386,388.01
  4. Step 4: Simplify right side
    609,442.57x = 353,282,045,742.63
  5. Step 5: Solve for x
    x = 353,282,045,742.63/609,442.57
  6. Step 6: Final answer
    x = 579,680.62

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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.