Home / 289,128.91-399,045.28-198,410.33

Finding the Fourth Proportional to 289,128.91, 399,045.28 and 198,410.33

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Solution

The fourth proportional to 289,128.91, 399,045.28 and 198,410.33 is: 273,838.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,128.91 : 399,045.28 = 198,410.33 : x
  2. Step 2: Convert to fraction form
    289,128.91/399,045.28 = 198,410.33/x
  3. Step 3: Cross multiply
    289,128.91x = 399,045.28 × 198,410.33
  4. Step 4: Simplify right side
    289,128.91x = 79,174,705,689.74
  5. Step 5: Solve for x
    x = 79,174,705,689.74/289,128.91
  6. Step 6: Final answer
    x = 273,838.77

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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.