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Finding the Fourth Proportional to 627,403.48, 865,813.76 and 355,470.84

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Solution

The fourth proportional to 627,403.48, 865,813.76 and 355,470.84 is: 490,548.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,403.48 : 865,813.76 = 355,470.84 : x
  2. Step 2: Convert to fraction form
    627,403.48/865,813.76 = 355,470.84/x
  3. Step 3: Cross multiply
    627,403.48x = 865,813.76 × 355,470.84
  4. Step 4: Simplify right side
    627,403.48x = 307,771,544,550.76
  5. Step 5: Solve for x
    x = 307,771,544,550.76/627,403.48
  6. Step 6: Final answer
    x = 490,548.04

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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.