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Finding the Fourth Proportional to 643,650.68, 888,247.68 and 357,189.32

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Solution

The fourth proportional to 643,650.68, 888,247.68 and 357,189.32 is: 492,926.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,650.68 : 888,247.68 = 357,189.32 : x
  2. Step 2: Convert to fraction form
    643,650.68/888,247.68 = 357,189.32/x
  3. Step 3: Cross multiply
    643,650.68x = 888,247.68 × 357,189.32
  4. Step 4: Simplify right side
    643,650.68x = 317,272,584,810.78
  5. Step 5: Solve for x
    x = 317,272,584,810.78/643,650.68
  6. Step 6: Final answer
    x = 492,926.67

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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.