Home / 689,040.78-1,033,699.13-385,866.07

Finding the Fourth Proportional to 689,040.78, 1,033,699.13 and 385,866.07

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Solution

The fourth proportional to 689,040.78, 1,033,699.13 and 385,866.07 is: 578,876.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,040.78 : 1,033,699.13 = 385,866.07 : x
  2. Step 2: Convert to fraction form
    689,040.78/1,033,699.13 = 385,866.07/x
  3. Step 3: Cross multiply
    689,040.78x = 1,033,699.13 × 385,866.07
  4. Step 4: Simplify right side
    689,040.78x = 398,869,420,855.52
  5. Step 5: Solve for x
    x = 398,869,420,855.52/689,040.78
  6. Step 6: Final answer
    x = 578,876.36

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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.