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Finding the Fourth Proportional to 494,999.40, 741,186.90 and 390,023.40

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Solution

The fourth proportional to 494,999.40, 741,186.90 and 390,023.40 is: 584,001.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,999.40 : 741,186.90 = 390,023.40 : x
  2. Step 2: Convert to fraction form
    494,999.40/741,186.90 = 390,023.40/x
  3. Step 3: Cross multiply
    494,999.40x = 741,186.90 × 390,023.40
  4. Step 4: Simplify right side
    494,999.40x = 289,080,234,773.46
  5. Step 5: Solve for x
    x = 289,080,234,773.46/494,999.40
  6. Step 6: Final answer
    x = 584,001.18

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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.