Home / 690,979.91-1,031,064.71-619,170.78

Finding the Fourth Proportional to 690,979.91, 1,031,064.71 and 619,170.78

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Solution

The fourth proportional to 690,979.91, 1,031,064.71 and 619,170.78 is: 923,912.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,979.91 : 1,031,064.71 = 619,170.78 : x
  2. Step 2: Convert to fraction form
    690,979.91/1,031,064.71 = 619,170.78/x
  3. Step 3: Cross multiply
    690,979.91x = 1,031,064.71 × 619,170.78
  4. Step 4: Simplify right side
    690,979.91x = 638,405,141,491.81
  5. Step 5: Solve for x
    x = 638,405,141,491.81/690,979.91
  6. Step 6: Final answer
    x = 923,912.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.