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Finding the Fourth Proportional to 257,647.33, 355,557 and 155,658.61

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Solution

The fourth proportional to 257,647.33, 355,557 and 155,658.61 is: 214,811.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,647.33 : 355,557 = 155,658.61 : x
  2. Step 2: Convert to fraction form
    257,647.33/355,557 = 155,658.61/x
  3. Step 3: Cross multiply
    257,647.33x = 355,557 × 155,658.61
  4. Step 4: Simplify right side
    257,647.33x = 55,345,508,395.77
  5. Step 5: Solve for x
    x = 55,345,508,395.77/257,647.33
  6. Step 6: Final answer
    x = 214,811.11

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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.