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Finding the Fourth Proportional to 627,405.39, 865,749.16 and 355,415.03

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Solution

The fourth proportional to 627,405.39, 865,749.16 and 355,415.03 is: 490,432.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,405.39 : 865,749.16 = 355,415.03 : x
  2. Step 2: Convert to fraction form
    627,405.39/865,749.16 = 355,415.03/x
  3. Step 3: Cross multiply
    627,405.39x = 865,749.16 × 355,415.03
  4. Step 4: Simplify right side
    627,405.39x = 307,700,264,949.71
  5. Step 5: Solve for x
    x = 307,700,264,949.71/627,405.39
  6. Step 6: Final answer
    x = 490,432.93

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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.