Home / 1,385,354.80-2,078,032.20-1,320,400.90

Finding the Fourth Proportional to 1,385,354.80, 2,078,032.20 and 1,320,400.90

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Solution

The fourth proportional to 1,385,354.80, 2,078,032.20 and 1,320,400.90 is: 1,980,601.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,354.80 : 2,078,032.20 = 1,320,400.90 : x
  2. Step 2: Convert to fraction form
    1,385,354.80/2,078,032.20 = 1,320,400.90/x
  3. Step 3: Cross multiply
    1,385,354.80x = 2,078,032.20 × 1,320,400.90
  4. Step 4: Simplify right side
    1,385,354.80x = 2,743,835,587,108.98
  5. Step 5: Solve for x
    x = 2,743,835,587,108.98/1,385,354.80
  6. Step 6: Final answer
    x = 1,980,601.35

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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.