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Finding the Fourth Proportional to 627,390.04, 865,796.11 and 355,509.78

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Solution

The fourth proportional to 627,390.04, 865,796.11 and 355,509.78 is: 490,602.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,390.04 : 865,796.11 = 355,509.78 : x
  2. Step 2: Convert to fraction form
    627,390.04/865,796.11 = 355,509.78/x
  3. Step 3: Cross multiply
    627,390.04x = 865,796.11 × 355,509.78
  4. Step 4: Simplify right side
    627,390.04x = 307,798,983,031.64
  5. Step 5: Solve for x
    x = 307,798,983,031.64/627,390.04
  6. Step 6: Final answer
    x = 490,602.28

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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.