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Finding the Fourth Proportional to 402,559.83, 555,531.30 and 221,283.06

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Solution

The fourth proportional to 402,559.83, 555,531.30 and 221,283.06 is: 305,369.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,559.83 : 555,531.30 = 221,283.06 : x
  2. Step 2: Convert to fraction form
    402,559.83/555,531.30 = 221,283.06/x
  3. Step 3: Cross multiply
    402,559.83x = 555,531.30 × 221,283.06
  4. Step 4: Simplify right side
    402,559.83x = 122,929,665,989.78
  5. Step 5: Solve for x
    x = 122,929,665,989.78/402,559.83
  6. Step 6: Final answer
    x = 305,369.93

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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.