Home / 690,736.70-1,031,039.08-640,080.56

Finding the Fourth Proportional to 690,736.70, 1,031,039.08 and 640,080.56

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Solution

The fourth proportional to 690,736.70, 1,031,039.08 and 640,080.56 is: 955,426.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,736.70 : 1,031,039.08 = 640,080.56 : x
  2. Step 2: Convert to fraction form
    690,736.70/1,031,039.08 = 640,080.56/x
  3. Step 3: Cross multiply
    690,736.70x = 1,031,039.08 × 640,080.56
  4. Step 4: Simplify right side
    690,736.70x = 659,948,071,708.29
  5. Step 5: Solve for x
    x = 659,948,071,708.29/690,736.70
  6. Step 6: Final answer
    x = 955,426.39

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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.