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Finding the Fourth Proportional to 402,458.88, 555,366.40 and 221,166.91

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Solution

The fourth proportional to 402,458.88, 555,366.40 and 221,166.91 is: 305,195.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,458.88 : 555,366.40 = 221,166.91 : x
  2. Step 2: Convert to fraction form
    402,458.88/555,366.40 = 221,166.91/x
  3. Step 3: Cross multiply
    402,458.88x = 555,366.40 × 221,166.91
  4. Step 4: Simplify right side
    402,458.88x = 122,828,668,664.49
  5. Step 5: Solve for x
    x = 122,828,668,664.49/402,458.88
  6. Step 6: Final answer
    x = 305,195.57

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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.