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Finding the Fourth Proportional to 643,299, 887,753.34 and 375,078.84

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Solution

The fourth proportional to 643,299, 887,753.34 and 375,078.84 is: 517,609.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,299 : 887,753.34 = 375,078.84 : x
  2. Step 2: Convert to fraction form
    643,299/887,753.34 = 375,078.84/x
  3. Step 3: Cross multiply
    643,299x = 887,753.34 × 375,078.84
  4. Step 4: Simplify right side
    643,299x = 332,977,492,973.33
  5. Step 5: Solve for x
    x = 332,977,492,973.33/643,299
  6. Step 6: Final answer
    x = 517,609.22

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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.