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Finding the Fourth Proportional to 994,401.85, 1,490,604 and 319,987.48

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Solution

The fourth proportional to 994,401.85, 1,490,604 and 319,987.48 is: 479,659.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    994,401.85 : 1,490,604 = 319,987.48 : x
  2. Step 2: Convert to fraction form
    994,401.85/1,490,604 = 319,987.48/x
  3. Step 3: Cross multiply
    994,401.85x = 1,490,604 × 319,987.48
  4. Step 4: Simplify right side
    994,401.85x = 476,974,617,637.92
  5. Step 5: Solve for x
    x = 476,974,617,637.92/994,401.85
  6. Step 6: Final answer
    x = 479,659.83

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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.