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Finding the Fourth Proportional to 627,722.80, 866,172.60 and 401,207.60

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Solution

The fourth proportional to 627,722.80, 866,172.60 and 401,207.60 is: 553,612.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,722.80 : 866,172.60 = 401,207.60 : x
  2. Step 2: Convert to fraction form
    627,722.80/866,172.60 = 401,207.60/x
  3. Step 3: Cross multiply
    627,722.80x = 866,172.60 × 401,207.60
  4. Step 4: Simplify right side
    627,722.80x = 347,515,030,031.76
  5. Step 5: Solve for x
    x = 347,515,030,031.76/627,722.80
  6. Step 6: Final answer
    x = 553,612.25

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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.