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Finding the Fourth Proportional to 550,386.10, 759,539.18 and 305,375.46

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Solution

The fourth proportional to 550,386.10, 759,539.18 and 305,375.46 is: 421,421.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,386.10 : 759,539.18 = 305,375.46 : x
  2. Step 2: Convert to fraction form
    550,386.10/759,539.18 = 305,375.46/x
  3. Step 3: Cross multiply
    550,386.10x = 759,539.18 × 305,375.46
  4. Step 4: Simplify right side
    550,386.10x = 231,944,626,480.52
  5. Step 5: Solve for x
    x = 231,944,626,480.52/550,386.10
  6. Step 6: Final answer
    x = 421,421.66

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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.