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Finding the Fourth Proportional to 402,751.99, 555,833.17 and 221,495.86

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Solution

The fourth proportional to 402,751.99, 555,833.17 and 221,495.86 is: 305,683.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,751.99 : 555,833.17 = 221,495.86 : x
  2. Step 2: Convert to fraction form
    402,751.99/555,833.17 = 221,495.86/x
  3. Step 3: Cross multiply
    402,751.99x = 555,833.17 × 221,495.86
  4. Step 4: Simplify right side
    402,751.99x = 123,114,746,005.68
  5. Step 5: Solve for x
    x = 123,114,746,005.68/402,751.99
  6. Step 6: Final answer
    x = 305,683.77

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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.