Home / 690,728.72-1,031,027.13-640,072.53

Finding the Fourth Proportional to 690,728.72, 1,031,027.13 and 640,072.53

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Solution

The fourth proportional to 690,728.72, 1,031,027.13 and 640,072.53 is: 955,414.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,728.72 : 1,031,027.13 = 640,072.53 : x
  2. Step 2: Convert to fraction form
    690,728.72/1,031,027.13 = 640,072.53/x
  3. Step 3: Cross multiply
    690,728.72x = 1,031,027.13 × 640,072.53
  4. Step 4: Simplify right side
    690,728.72x = 659,932,143,597.74
  5. Step 5: Solve for x
    x = 659,932,143,597.74/690,728.72
  6. Step 6: Final answer
    x = 955,414.38

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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.