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Finding the Fourth Proportional to 388,063.48, 535,545.22 and 215,992.45

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Solution

The fourth proportional to 388,063.48, 535,545.22 and 215,992.45 is: 298,079.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,063.48 : 535,545.22 = 215,992.45 : x
  2. Step 2: Convert to fraction form
    388,063.48/535,545.22 = 215,992.45/x
  3. Step 3: Cross multiply
    388,063.48x = 535,545.22 × 215,992.45
  4. Step 4: Simplify right side
    388,063.48x = 115,673,723,181.80
  5. Step 5: Solve for x
    x = 115,673,723,181.80/388,063.48
  6. Step 6: Final answer
    x = 298,079.38

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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.