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Finding the Fourth Proportional to 257,668.56, 355,585.68 and 142,949.34

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Solution

The fourth proportional to 257,668.56, 355,585.68 and 142,949.34 is: 197,271.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,668.56 : 355,585.68 = 142,949.34 : x
  2. Step 2: Convert to fraction form
    257,668.56/355,585.68 = 142,949.34/x
  3. Step 3: Cross multiply
    257,668.56x = 355,585.68 × 142,949.34
  4. Step 4: Simplify right side
    257,668.56x = 50,830,738,269.45
  5. Step 5: Solve for x
    x = 50,830,738,269.45/257,668.56
  6. Step 6: Final answer
    x = 197,271.79

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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.