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Finding the Fourth Proportional to 402,502.05, 555,455.82 and 221,217.06

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Solution

The fourth proportional to 402,502.05, 555,455.82 and 221,217.06 is: 305,281.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,502.05 : 555,455.82 = 221,217.06 : x
  2. Step 2: Convert to fraction form
    402,502.05/555,455.82 = 221,217.06/x
  3. Step 3: Cross multiply
    402,502.05x = 555,455.82 × 221,217.06
  4. Step 4: Simplify right side
    402,502.05x = 122,876,303,460.29
  5. Step 5: Solve for x
    x = 122,876,303,460.29/402,502.05
  6. Step 6: Final answer
    x = 305,281.19

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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.