Home / 554,140.78-763,839.77-408,479.59

Finding the Fourth Proportional to 554,140.78, 763,839.77 and 408,479.59

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Solution

The fourth proportional to 554,140.78, 763,839.77 and 408,479.59 is: 563,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,140.78 : 763,839.77 = 408,479.59 : x
  2. Step 2: Convert to fraction form
    554,140.78/763,839.77 = 408,479.59/x
  3. Step 3: Cross multiply
    554,140.78x = 763,839.77 × 408,479.59
  4. Step 4: Simplify right side
    554,140.78x = 312,012,957,285.39
  5. Step 5: Solve for x
    x = 312,012,957,285.39/554,140.78
  6. Step 6: Final answer
    x = 563,057.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.