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Finding the Fourth Proportional to 318,633.52, 439,490.28 and 209,703.15

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Solution

The fourth proportional to 318,633.52, 439,490.28 and 209,703.15 is: 289,242.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,633.52 : 439,490.28 = 209,703.15 : x
  2. Step 2: Convert to fraction form
    318,633.52/439,490.28 = 209,703.15/x
  3. Step 3: Cross multiply
    318,633.52x = 439,490.28 × 209,703.15
  4. Step 4: Simplify right side
    318,633.52x = 92,162,493,963.14
  5. Step 5: Solve for x
    x = 92,162,493,963.14/318,633.52
  6. Step 6: Final answer
    x = 289,242.93

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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.