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Finding the Fourth Proportional to 554,428.78, 765,110.67 and 312,710.62

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Solution

The fourth proportional to 554,428.78, 765,110.67 and 312,710.62 is: 431,540.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,428.78 : 765,110.67 = 312,710.62 : x
  2. Step 2: Convert to fraction form
    554,428.78/765,110.67 = 312,710.62/x
  3. Step 3: Cross multiply
    554,428.78x = 765,110.67 × 312,710.62
  4. Step 4: Simplify right side
    554,428.78x = 239,258,231,984.32
  5. Step 5: Solve for x
    x = 239,258,231,984.32/554,428.78
  6. Step 6: Final answer
    x = 431,540.07

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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.