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Finding the Fourth Proportional to 628,030.15, 866,663.07 and 356,122.87

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Solution

The fourth proportional to 628,030.15, 866,663.07 and 356,122.87 is: 491,439.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,030.15 : 866,663.07 = 356,122.87 : x
  2. Step 2: Convert to fraction form
    628,030.15/866,663.07 = 356,122.87/x
  3. Step 3: Cross multiply
    628,030.15x = 866,663.07 × 356,122.87
  4. Step 4: Simplify right side
    628,030.15x = 308,638,539,811.41
  5. Step 5: Solve for x
    x = 308,638,539,811.41/628,030.15
  6. Step 6: Final answer
    x = 491,439.05

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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.