Home / 690,648.89-1,035,187.76-420,180.83

Finding the Fourth Proportional to 690,648.89, 1,035,187.76 and 420,180.83

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Solution

The fourth proportional to 690,648.89, 1,035,187.76 and 420,180.83 is: 629,793.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,648.89 : 1,035,187.76 = 420,180.83 : x
  2. Step 2: Convert to fraction form
    690,648.89/1,035,187.76 = 420,180.83/x
  3. Step 3: Cross multiply
    690,648.89x = 1,035,187.76 × 420,180.83
  4. Step 4: Simplify right side
    690,648.89x = 434,966,044,925.80
  5. Step 5: Solve for x
    x = 434,966,044,925.80/690,648.89
  6. Step 6: Final answer
    x = 629,793.30

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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.