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Finding the Fourth Proportional to 627,402.36, 865,744.98 and 355,412.00

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Solution

The fourth proportional to 627,402.36, 865,744.98 and 355,412.00 is: 490,428.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,402.36 : 865,744.98 = 355,412.00 : x
  2. Step 2: Convert to fraction form
    627,402.36/865,744.98 = 355,412.00/x
  3. Step 3: Cross multiply
    627,402.36x = 865,744.98 × 355,412.00
  4. Step 4: Simplify right side
    627,402.36x = 307,696,150,503.04
  5. Step 5: Solve for x
    x = 307,696,150,503.04/627,402.36
  6. Step 6: Final answer
    x = 490,428.74

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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.