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Finding the Fourth Proportional to 402,790.40, 604,166.40 and 136,524.80

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Solution

The fourth proportional to 402,790.40, 604,166.40 and 136,524.80 is: 204,780.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,790.40 : 604,166.40 = 136,524.80 : x
  2. Step 2: Convert to fraction form
    402,790.40/604,166.40 = 136,524.80/x
  3. Step 3: Cross multiply
    402,790.40x = 604,166.40 × 136,524.80
  4. Step 4: Simplify right side
    402,790.40x = 82,483,696,926.72
  5. Step 5: Solve for x
    x = 82,483,696,926.72/402,790.40
  6. Step 6: Final answer
    x = 204,780.69

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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.