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Finding the Fourth Proportional to 627,279.54, 865,688.61 and 355,349.67

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Solution

The fourth proportional to 627,279.54, 865,688.61 and 355,349.67 is: 490,406.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,279.54 : 865,688.61 = 355,349.67 : x
  2. Step 2: Convert to fraction form
    627,279.54/865,688.61 = 355,349.67/x
  3. Step 3: Cross multiply
    627,279.54x = 865,688.61 × 355,349.67
  4. Step 4: Simplify right side
    627,279.54x = 307,622,161,886.26
  5. Step 5: Solve for x
    x = 307,622,161,886.26/627,279.54
  6. Step 6: Final answer
    x = 490,406.82

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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.