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Finding the Fourth Proportional to 628,143.95, 866,915.61 and 370,007.56

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Solution

The fourth proportional to 628,143.95, 866,915.61 and 370,007.56 is: 510,655.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,143.95 : 866,915.61 = 370,007.56 : x
  2. Step 2: Convert to fraction form
    628,143.95/866,915.61 = 370,007.56/x
  3. Step 3: Cross multiply
    628,143.95x = 866,915.61 × 370,007.56
  4. Step 4: Simplify right side
    628,143.95x = 320,765,326,531.38
  5. Step 5: Solve for x
    x = 320,765,326,531.38/628,143.95
  6. Step 6: Final answer
    x = 510,655.76

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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.