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Finding the Fourth Proportional to 628,029.15, 866,661.69 and 356,121.87

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Solution

The fourth proportional to 628,029.15, 866,661.69 and 356,121.87 is: 491,437.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,029.15 : 866,661.69 = 356,121.87 : x
  2. Step 2: Convert to fraction form
    628,029.15/866,661.69 = 356,121.87/x
  3. Step 3: Cross multiply
    628,029.15x = 866,661.69 × 356,121.87
  4. Step 4: Simplify right side
    628,029.15x = 308,637,181,700.16
  5. Step 5: Solve for x
    x = 308,637,181,700.16/628,029.15
  6. Step 6: Final answer
    x = 491,437.67

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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.