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Finding the Fourth Proportional to 628,988, 868,022.88 and 360,716

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Solution

The fourth proportional to 628,988, 868,022.88 and 360,716 is: 497,799.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,988 : 868,022.88 = 360,716 : x
  2. Step 2: Convert to fraction form
    628,988/868,022.88 = 360,716/x
  3. Step 3: Cross multiply
    628,988x = 868,022.88 × 360,716
  4. Step 4: Simplify right side
    628,988x = 313,109,741,182.08
  5. Step 5: Solve for x
    x = 313,109,741,182.08/628,988
  6. Step 6: Final answer
    x = 497,799.23

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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.