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Finding the Fourth Proportional to 618,388.67, 927,558.74 and 258,466.56

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Solution

The fourth proportional to 618,388.67, 927,558.74 and 258,466.56 is: 387,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,388.67 : 927,558.74 = 258,466.56 : x
  2. Step 2: Convert to fraction form
    618,388.67/927,558.74 = 258,466.56/x
  3. Step 3: Cross multiply
    618,388.67x = 927,558.74 × 258,466.56
  4. Step 4: Simplify right side
    618,388.67x = 239,742,919,111.07
  5. Step 5: Solve for x
    x = 239,742,919,111.07/618,388.67
  6. Step 6: Final answer
    x = 387,689.70

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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.