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Finding the Fourth Proportional to 402,763.71, 555,794.88 and 221,483.28

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Solution

The fourth proportional to 402,763.71, 555,794.88 and 221,483.28 is: 305,636.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,763.71 : 555,794.88 = 221,483.28 : x
  2. Step 2: Convert to fraction form
    402,763.71/555,794.88 = 221,483.28/x
  3. Step 3: Cross multiply
    402,763.71x = 555,794.88 × 221,483.28
  4. Step 4: Simplify right side
    402,763.71x = 123,099,272,402.77
  5. Step 5: Solve for x
    x = 123,099,272,402.77/402,763.71
  6. Step 6: Final answer
    x = 305,636.46

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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.