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Finding the Fourth Proportional to 550,432.91, 759,603.65 and 305,422.08

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Solution

The fourth proportional to 550,432.91, 759,603.65 and 305,422.08 is: 421,485.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,432.91 : 759,603.65 = 305,422.08 : x
  2. Step 2: Convert to fraction form
    550,432.91/759,603.65 = 305,422.08/x
  3. Step 3: Cross multiply
    550,432.91x = 759,603.65 × 305,422.08
  4. Step 4: Simplify right side
    550,432.91x = 231,999,725,231.48
  5. Step 5: Solve for x
    x = 231,999,725,231.48/550,432.91
  6. Step 6: Final answer
    x = 421,485.93

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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.