Home / 515,266.39-771,677.79-408,306.45

Finding the Fourth Proportional to 515,266.39, 771,677.79 and 408,306.45

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Solution

The fourth proportional to 515,266.39, 771,677.79 and 408,306.45 is: 611,491.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,266.39 : 771,677.79 = 408,306.45 : x
  2. Step 2: Convert to fraction form
    515,266.39/771,677.79 = 408,306.45/x
  3. Step 3: Cross multiply
    515,266.39x = 771,677.79 × 408,306.45
  4. Step 4: Simplify right side
    515,266.39x = 315,081,013,830.36
  5. Step 5: Solve for x
    x = 315,081,013,830.36/515,266.39
  6. Step 6: Final answer
    x = 611,491.49

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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.