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Finding the Fourth Proportional to 402,752.40, 555,779.28 and 221,471.97

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Solution

The fourth proportional to 402,752.40, 555,779.28 and 221,471.97 is: 305,620.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,752.40 : 555,779.28 = 221,471.97 : x
  2. Step 2: Convert to fraction form
    402,752.40/555,779.28 = 221,471.97/x
  3. Step 3: Cross multiply
    402,752.40x = 555,779.28 × 221,471.97
  4. Step 4: Simplify right side
    402,752.40x = 123,089,529,247.89
  5. Step 5: Solve for x
    x = 123,089,529,247.89/402,752.40
  6. Step 6: Final answer
    x = 305,620.85

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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.