Home / 690,748.45-1,036,262.80-217,323.70

Finding the Fourth Proportional to 690,748.45, 1,036,262.80 and 217,323.70

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Solution

The fourth proportional to 690,748.45, 1,036,262.80 and 217,323.70 is: 326,029.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,748.45 : 1,036,262.80 = 217,323.70 : x
  2. Step 2: Convert to fraction form
    690,748.45/1,036,262.80 = 217,323.70/x
  3. Step 3: Cross multiply
    690,748.45x = 1,036,262.80 × 217,323.70
  4. Step 4: Simplify right side
    690,748.45x = 225,204,465,868.36
  5. Step 5: Solve for x
    x = 225,204,465,868.36/690,748.45
  6. Step 6: Final answer
    x = 326,029.64

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1.5x scale

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.