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Finding the Fourth Proportional to 628,031.81, 866,657.51 and 356,118.02

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Solution

The fourth proportional to 628,031.81, 866,657.51 and 356,118.02 is: 491,427.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,031.81 : 866,657.51 = 356,118.02 : x
  2. Step 2: Convert to fraction form
    628,031.81/866,657.51 = 356,118.02/x
  3. Step 3: Cross multiply
    628,031.81x = 866,657.51 × 356,118.02
  4. Step 4: Simplify right side
    628,031.81x = 308,632,354,950.86
  5. Step 5: Solve for x
    x = 308,632,354,950.86/628,031.81
  6. Step 6: Final answer
    x = 491,427.90

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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.