Home / 689,110.40-1,031,624.40-512,400.80

Finding the Fourth Proportional to 689,110.40, 1,031,624.40 and 512,400.80

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Solution

The fourth proportional to 689,110.40, 1,031,624.40 and 512,400.80 is: 767,083.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,110.40 : 1,031,624.40 = 512,400.80 : x
  2. Step 2: Convert to fraction form
    689,110.40/1,031,624.40 = 512,400.80/x
  3. Step 3: Cross multiply
    689,110.40x = 1,031,624.40 × 512,400.80
  4. Step 4: Simplify right side
    689,110.40x = 528,605,167,859.52
  5. Step 5: Solve for x
    x = 528,605,167,859.52/689,110.40
  6. Step 6: Final answer
    x = 767,083.43

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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.