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Finding the Fourth Proportional to 555,664.40, 766,815 and 301,015.28

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Solution

The fourth proportional to 555,664.40, 766,815 and 301,015.28 is: 415,400.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,664.40 : 766,815 = 301,015.28 : x
  2. Step 2: Convert to fraction form
    555,664.40/766,815 = 301,015.28/x
  3. Step 3: Cross multiply
    555,664.40x = 766,815 × 301,015.28
  4. Step 4: Simplify right side
    555,664.40x = 230,823,031,933.20
  5. Step 5: Solve for x
    x = 230,823,031,933.20/555,664.40
  6. Step 6: Final answer
    x = 415,400.07

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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.