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Finding the Fourth Proportional to 550,711.67, 759,995.20 and 309,012.12

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Solution

The fourth proportional to 550,711.67, 759,995.20 and 309,012.12 is: 426,444.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,711.67 : 759,995.20 = 309,012.12 : x
  2. Step 2: Convert to fraction form
    550,711.67/759,995.20 = 309,012.12/x
  3. Step 3: Cross multiply
    550,711.67x = 759,995.20 × 309,012.12
  4. Step 4: Simplify right side
    550,711.67x = 234,847,727,941.82
  5. Step 5: Solve for x
    x = 234,847,727,941.82/550,711.67
  6. Step 6: Final answer
    x = 426,444.08

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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.