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Finding the Fourth Proportional to 257,740.82, 355,684.23 and 143,019.91

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Solution

The fourth proportional to 257,740.82, 355,684.23 and 143,019.91 is: 197,368.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,740.82 : 355,684.23 = 143,019.91 : x
  2. Step 2: Convert to fraction form
    257,740.82/355,684.23 = 143,019.91/x
  3. Step 3: Cross multiply
    257,740.82x = 355,684.23 × 143,019.91
  4. Step 4: Simplify right side
    257,740.82x = 50,869,927,007.62
  5. Step 5: Solve for x
    x = 50,869,927,007.62/257,740.82
  6. Step 6: Final answer
    x = 197,368.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.