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Finding the Fourth Proportional to 257,469.74, 355,329.18 and 142,759.77

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Solution

The fourth proportional to 257,469.74, 355,329.18 and 142,759.77 is: 197,020.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,469.74 : 355,329.18 = 142,759.77 : x
  2. Step 2: Convert to fraction form
    257,469.74/355,329.18 = 142,759.77/x
  3. Step 3: Cross multiply
    257,469.74x = 355,329.18 × 142,759.77
  4. Step 4: Simplify right side
    257,469.74x = 50,726,710,678.60
  5. Step 5: Solve for x
    x = 50,726,710,678.60/257,469.74
  6. Step 6: Final answer
    x = 197,020.09

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1.5x scale

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.