Home / 1,230,400.80-1,845,601.20-690,102.45

Finding the Fourth Proportional to 1,230,400.80, 1,845,601.20 and 690,102.45

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Solution

The fourth proportional to 1,230,400.80, 1,845,601.20 and 690,102.45 is: 1,035,153.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,400.80 : 1,845,601.20 = 690,102.45 : x
  2. Step 2: Convert to fraction form
    1,230,400.80/1,845,601.20 = 690,102.45/x
  3. Step 3: Cross multiply
    1,230,400.80x = 1,845,601.20 × 690,102.45
  4. Step 4: Simplify right side
    1,230,400.80x = 1,273,653,909,842.94
  5. Step 5: Solve for x
    x = 1,273,653,909,842.94/1,230,400.80
  6. Step 6: Final answer
    x = 1,035,153.68

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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.