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Finding the Fourth Proportional to 402,434.40, 603,651.60 and 136,203.60

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Solution

The fourth proportional to 402,434.40, 603,651.60 and 136,203.60 is: 204,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,434.40 : 603,651.60 = 136,203.60 : x
  2. Step 2: Convert to fraction form
    402,434.40/603,651.60 = 136,203.60/x
  3. Step 3: Cross multiply
    402,434.40x = 603,651.60 × 136,203.60
  4. Step 4: Simplify right side
    402,434.40x = 82,219,521,065.76
  5. Step 5: Solve for x
    x = 82,219,521,065.76/402,434.40
  6. Step 6: Final answer
    x = 204,305.40

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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.