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Finding the Fourth Proportional to 643,466.82, 888,090.44 and 357,079.17

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Solution

The fourth proportional to 643,466.82, 888,090.44 and 357,079.17 is: 492,828.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,466.82 : 888,090.44 = 357,079.17 : x
  2. Step 2: Convert to fraction form
    643,466.82/888,090.44 = 357,079.17/x
  3. Step 3: Cross multiply
    643,466.82x = 888,090.44 × 357,079.17
  4. Step 4: Simplify right side
    643,466.82x = 317,118,595,414.74
  5. Step 5: Solve for x
    x = 317,118,595,414.74/643,466.82
  6. Step 6: Final answer
    x = 492,828.20

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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.