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Finding the Fourth Proportional to 257,855.62, 355,835.12 and 143,127.52

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Solution

The fourth proportional to 257,855.62, 355,835.12 and 143,127.52 is: 197,512.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,855.62 : 355,835.12 = 143,127.52 : x
  2. Step 2: Convert to fraction form
    257,855.62/355,835.12 = 143,127.52/x
  3. Step 3: Cross multiply
    257,855.62x = 355,835.12 × 143,127.52
  4. Step 4: Simplify right side
    257,855.62x = 50,929,798,254.50
  5. Step 5: Solve for x
    x = 50,929,798,254.50/257,855.62
  6. Step 6: Final answer
    x = 197,512.85

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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.