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Finding the Fourth Proportional to 402,396.60, 603,376.20 and 165,763.20

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Solution

The fourth proportional to 402,396.60, 603,376.20 and 165,763.20 is: 248,554.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,396.60 : 603,376.20 = 165,763.20 : x
  2. Step 2: Convert to fraction form
    402,396.60/603,376.20 = 165,763.20/x
  3. Step 3: Cross multiply
    402,396.60x = 603,376.20 × 165,763.20
  4. Step 4: Simplify right side
    402,396.60x = 100,017,569,715.84
  5. Step 5: Solve for x
    x = 100,017,569,715.84/402,396.60
  6. Step 6: Final answer
    x = 248,554.71

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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.