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Finding the Fourth Proportional to 402,329.64, 555,215.22 and 221,053.26

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Solution

The fourth proportional to 402,329.64, 555,215.22 and 221,053.26 is: 305,053.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,329.64 : 555,215.22 = 221,053.26 : x
  2. Step 2: Convert to fraction form
    402,329.64/555,215.22 = 221,053.26/x
  3. Step 3: Cross multiply
    402,329.64x = 555,215.22 × 221,053.26
  4. Step 4: Simplify right side
    402,329.64x = 122,732,134,382.62
  5. Step 5: Solve for x
    x = 122,732,134,382.62/402,329.64
  6. Step 6: Final answer
    x = 305,053.67

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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.