Home / 1,401,139.80-2,101,418.10-390,000.60

Finding the Fourth Proportional to 1,401,139.80, 2,101,418.10 and 390,000.60

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Solution

The fourth proportional to 1,401,139.80, 2,101,418.10 and 390,000.60 is: 584,919.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401,139.80 : 2,101,418.10 = 390,000.60 : x
  2. Step 2: Convert to fraction form
    1,401,139.80/2,101,418.10 = 390,000.60/x
  3. Step 3: Cross multiply
    1,401,139.80x = 2,101,418.10 × 390,000.60
  4. Step 4: Simplify right side
    1,401,139.80x = 819,554,319,850.86
  5. Step 5: Solve for x
    x = 819,554,319,850.86/1,401,139.80
  6. Step 6: Final answer
    x = 584,919.73

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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.