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Finding the Fourth Proportional to 628,665.40, 867,677.88 and 356,758.57

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Solution

The fourth proportional to 628,665.40, 867,677.88 and 356,758.57 is: 492,394.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,665.40 : 867,677.88 = 356,758.57 : x
  2. Step 2: Convert to fraction form
    628,665.40/867,677.88 = 356,758.57/x
  3. Step 3: Cross multiply
    628,665.40x = 867,677.88 × 356,758.57
  4. Step 4: Simplify right side
    628,665.40x = 309,551,519,689.43
  5. Step 5: Solve for x
    x = 309,551,519,689.43/628,665.40
  6. Step 6: Final answer
    x = 492,394.71

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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.