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Finding the Fourth Proportional to 257,841.70, 355,816.02 and 143,113.66

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Solution

The fourth proportional to 257,841.70, 355,816.02 and 143,113.66 is: 197,493.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,841.70 : 355,816.02 = 143,113.66 : x
  2. Step 2: Convert to fraction form
    257,841.70/355,816.02 = 143,113.66/x
  3. Step 3: Cross multiply
    257,841.70x = 355,816.02 × 143,113.66
  4. Step 4: Simplify right side
    257,841.70x = 50,922,132,908.83
  5. Step 5: Solve for x
    x = 50,922,132,908.83/257,841.70
  6. Step 6: Final answer
    x = 197,493.78

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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.