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Finding the Fourth Proportional to 371,515.55, 557,097.66 and 143,917.77

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Solution

The fourth proportional to 371,515.55, 557,097.66 and 143,917.77 is: 215,808.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,515.55 : 557,097.66 = 143,917.77 : x
  2. Step 2: Convert to fraction form
    371,515.55/557,097.66 = 143,917.77/x
  3. Step 3: Cross multiply
    371,515.55x = 557,097.66 × 143,917.77
  4. Step 4: Simplify right side
    371,515.55x = 80,176,252,899.42
  5. Step 5: Solve for x
    x = 80,176,252,899.42/371,515.55
  6. Step 6: Final answer
    x = 215,808.61

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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.