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Finding the Fourth Proportional to 627,247.28, 865,538.79 and 355,260.89

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Solution

The fourth proportional to 627,247.28, 865,538.79 and 355,260.89 is: 490,224.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,247.28 : 865,538.79 = 355,260.89 : x
  2. Step 2: Convert to fraction form
    627,247.28/865,538.79 = 355,260.89/x
  3. Step 3: Cross multiply
    627,247.28x = 865,538.79 × 355,260.89
  4. Step 4: Simplify right side
    627,247.28x = 307,492,080,864.92
  5. Step 5: Solve for x
    x = 307,492,080,864.92/627,247.28
  6. Step 6: Final answer
    x = 490,224.65

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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.