Home / 257,488.75-355,355.40-142,778.80

Finding the Fourth Proportional to 257,488.75, 355,355.40 and 142,778.80

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Solution

The fourth proportional to 257,488.75, 355,355.40 and 142,778.80 is: 197,046.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,488.75 : 355,355.40 = 142,778.80 : x
  2. Step 2: Convert to fraction form
    257,488.75/355,355.40 = 142,778.80/x
  3. Step 3: Cross multiply
    257,488.75x = 355,355.40 × 142,778.80
  4. Step 4: Simplify right side
    257,488.75x = 50,737,217,585.52
  5. Step 5: Solve for x
    x = 50,737,217,585.52/257,488.75
  6. Step 6: Final answer
    x = 197,046.35

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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.