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Finding the Fourth Proportional to 288,123.20, 403,787.20 and 288,123.20

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Solution

The fourth proportional to 288,123.20, 403,787.20 and 288,123.20 is: 403,787.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,123.20 : 403,787.20 = 288,123.20 : x
  2. Step 2: Convert to fraction form
    288,123.20/403,787.20 = 288,123.20/x
  3. Step 3: Cross multiply
    288,123.20x = 403,787.20 × 288,123.20
  4. Step 4: Simplify right side
    288,123.20x = 116,340,460,183.04
  5. Step 5: Solve for x
    x = 116,340,460,183.04/288,123.20
  6. Step 6: Final answer
    x = 403,787.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.