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Finding the Fourth Proportional to 257,340.80, 355,045.22 and 155,327.52

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Solution

The fourth proportional to 257,340.80, 355,045.22 and 155,327.52 is: 214,300.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,340.80 : 355,045.22 = 155,327.52 : x
  2. Step 2: Convert to fraction form
    257,340.80/355,045.22 = 155,327.52/x
  3. Step 3: Cross multiply
    257,340.80x = 355,045.22 × 155,327.52
  4. Step 4: Simplify right side
    257,340.80x = 55,148,295,521.43
  5. Step 5: Solve for x
    x = 55,148,295,521.43/257,340.80
  6. Step 6: Final answer
    x = 214,300.63

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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.