Home / 687,923.80-1,031,540.10-313,523.80

Finding the Fourth Proportional to 687,923.80, 1,031,540.10 and 313,523.80

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Solution

The fourth proportional to 687,923.80, 1,031,540.10 and 313,523.80 is: 470,128.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,923.80 : 1,031,540.10 = 313,523.80 : x
  2. Step 2: Convert to fraction form
    687,923.80/1,031,540.10 = 313,523.80/x
  3. Step 3: Cross multiply
    687,923.80x = 1,031,540.10 × 313,523.80
  4. Step 4: Simplify right side
    687,923.80x = 323,412,372,004.38
  5. Step 5: Solve for x
    x = 323,412,372,004.38/687,923.80
  6. Step 6: Final answer
    x = 470,128.19

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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.