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Finding the Fourth Proportional to 687,170.88, 948,294 and 385,371.36

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Solution

The fourth proportional to 687,170.88, 948,294 and 385,371.36 is: 531,811.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,170.88 : 948,294 = 385,371.36 : x
  2. Step 2: Convert to fraction form
    687,170.88/948,294 = 385,371.36/x
  3. Step 3: Cross multiply
    687,170.88x = 948,294 × 385,371.36
  4. Step 4: Simplify right side
    687,170.88x = 365,445,348,459.84
  5. Step 5: Solve for x
    x = 365,445,348,459.84/687,170.88
  6. Step 6: Final answer
    x = 531,811.46

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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.