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Finding the Fourth Proportional to 628,813.22, 868,338.63 and 399,444.44

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Solution

The fourth proportional to 628,813.22, 868,338.63 and 399,444.44 is: 551,599.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,813.22 : 868,338.63 = 399,444.44 : x
  2. Step 2: Convert to fraction form
    628,813.22/868,338.63 = 399,444.44/x
  3. Step 3: Cross multiply
    628,813.22x = 868,338.63 × 399,444.44
  4. Step 4: Simplify right side
    628,813.22x = 346,853,033,449.02
  5. Step 5: Solve for x
    x = 346,853,033,449.02/628,813.22
  6. Step 6: Final answer
    x = 551,599.47

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1.5x scale

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.