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Finding the Fourth Proportional to 691,754, 954,635.10 and 389,948

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Solution

The fourth proportional to 691,754, 954,635.10 and 389,948 is: 538,136.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,754 : 954,635.10 = 389,948 : x
  2. Step 2: Convert to fraction form
    691,754/954,635.10 = 389,948/x
  3. Step 3: Cross multiply
    691,754x = 954,635.10 × 389,948
  4. Step 4: Simplify right side
    691,754x = 372,258,047,974.80
  5. Step 5: Solve for x
    x = 372,258,047,974.80/691,754
  6. Step 6: Final answer
    x = 538,136.46

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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.