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Finding the Fourth Proportional to 386,328.80, 579,493.20 and 366,645.80

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Solution

The fourth proportional to 386,328.80, 579,493.20 and 366,645.80 is: 549,968.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,328.80 : 579,493.20 = 366,645.80 : x
  2. Step 2: Convert to fraction form
    386,328.80/579,493.20 = 366,645.80/x
  3. Step 3: Cross multiply
    386,328.80x = 579,493.20 × 366,645.80
  4. Step 4: Simplify right side
    386,328.80x = 212,468,747,908.56
  5. Step 5: Solve for x
    x = 212,468,747,908.56/386,328.80
  6. Step 6: Final answer
    x = 549,968.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.