Home / 579,618.40-868,261.20-390,661.60

Finding the Fourth Proportional to 579,618.40, 868,261.20 and 390,661.60

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Solution

The fourth proportional to 579,618.40, 868,261.20 and 390,661.60 is: 585,206.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,618.40 : 868,261.20 = 390,661.60 : x
  2. Step 2: Convert to fraction form
    579,618.40/868,261.20 = 390,661.60/x
  3. Step 3: Cross multiply
    579,618.40x = 868,261.20 × 390,661.60
  4. Step 4: Simplify right side
    579,618.40x = 339,196,309,609.92
  5. Step 5: Solve for x
    x = 339,196,309,609.92/579,618.40
  6. Step 6: Final answer
    x = 585,206.25

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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.