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Finding the Fourth Proportional to 643,818.24, 888,427.44 and 357,338.40

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Solution

The fourth proportional to 643,818.24, 888,427.44 and 357,338.40 is: 493,103.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,818.24 : 888,427.44 = 357,338.40 : x
  2. Step 2: Convert to fraction form
    643,818.24/888,427.44 = 357,338.40/x
  3. Step 3: Cross multiply
    643,818.24x = 888,427.44 × 357,338.40
  4. Step 4: Simplify right side
    643,818.24x = 317,469,239,925.70
  5. Step 5: Solve for x
    x = 317,469,239,925.70/643,818.24
  6. Step 6: Final answer
    x = 493,103.83

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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.