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Finding the Fourth Proportional to 355,143.40, 532,690.80 and 115,253.80

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Solution

The fourth proportional to 355,143.40, 532,690.80 and 115,253.80 is: 172,872.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,143.40 : 532,690.80 = 115,253.80 : x
  2. Step 2: Convert to fraction form
    355,143.40/532,690.80 = 115,253.80/x
  3. Step 3: Cross multiply
    355,143.40x = 532,690.80 × 115,253.80
  4. Step 4: Simplify right side
    355,143.40x = 61,394,638,925.04
  5. Step 5: Solve for x
    x = 61,394,638,925.04/355,143.40
  6. Step 6: Final answer
    x = 172,872.81

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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.