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Finding the Fourth Proportional to 778,980, 1,074,992.40 and 553,019.16

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Solution

The fourth proportional to 778,980, 1,074,992.40 and 553,019.16 is: 763,166.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,980 : 1,074,992.40 = 553,019.16 : x
  2. Step 2: Convert to fraction form
    778,980/1,074,992.40 = 553,019.16/x
  3. Step 3: Cross multiply
    778,980x = 1,074,992.40 × 553,019.16
  4. Step 4: Simplify right side
    778,980x = 594,491,394,054.38
  5. Step 5: Solve for x
    x = 594,491,394,054.38/778,980
  6. Step 6: Final answer
    x = 763,166.44

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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.