Home / 515,078.07-772,839.11-278,587.23

Finding the Fourth Proportional to 515,078.07, 772,839.11 and 278,587.23

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Solution

The fourth proportional to 515,078.07, 772,839.11 and 278,587.23 is: 418,000.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,078.07 : 772,839.11 = 278,587.23 : x
  2. Step 2: Convert to fraction form
    515,078.07/772,839.11 = 278,587.23/x
  3. Step 3: Cross multiply
    515,078.07x = 772,839.11 × 278,587.23
  4. Step 4: Simplify right side
    515,078.07x = 215,303,105,497.63
  5. Step 5: Solve for x
    x = 215,303,105,497.63/515,078.07
  6. Step 6: Final answer
    x = 418,000.92

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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.