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Finding the Fourth Proportional to 402,206.20, 603,390.30 and 117,896.20

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Solution

The fourth proportional to 402,206.20, 603,390.30 and 117,896.20 is: 176,868.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,206.20 : 603,390.30 = 117,896.20 : x
  2. Step 2: Convert to fraction form
    402,206.20/603,390.30 = 117,896.20/x
  3. Step 3: Cross multiply
    402,206.20x = 603,390.30 × 117,896.20
  4. Step 4: Simplify right side
    402,206.20x = 71,137,423,486.86
  5. Step 5: Solve for x
    x = 71,137,423,486.86/402,206.20
  6. Step 6: Final answer
    x = 176,868.04

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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.