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Finding the Fourth Proportional to 385,551.30, 578,351.52 and 119,289.48

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Solution

The fourth proportional to 385,551.30, 578,351.52 and 119,289.48 is: 178,941.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,551.30 : 578,351.52 = 119,289.48 : x
  2. Step 2: Convert to fraction form
    385,551.30/578,351.52 = 119,289.48/x
  3. Step 3: Cross multiply
    385,551.30x = 578,351.52 × 119,289.48
  4. Step 4: Simplify right side
    385,551.30x = 68,991,252,078.01
  5. Step 5: Solve for x
    x = 68,991,252,078.01/385,551.30
  6. Step 6: Final answer
    x = 178,941.82

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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.