Home / 686,388.57-1,028,970.50-349,240.65

Finding the Fourth Proportional to 686,388.57, 1,028,970.50 and 349,240.65

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Solution

The fourth proportional to 686,388.57, 1,028,970.50 and 349,240.65 is: 523,549.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,388.57 : 1,028,970.50 = 349,240.65 : x
  2. Step 2: Convert to fraction form
    686,388.57/1,028,970.50 = 349,240.65/x
  3. Step 3: Cross multiply
    686,388.57x = 1,028,970.50 × 349,240.65
  4. Step 4: Simplify right side
    686,388.57x = 359,358,324,504.62
  5. Step 5: Solve for x
    x = 359,358,324,504.62/686,388.57
  6. Step 6: Final answer
    x = 523,549.40

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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.