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Finding the Fourth Proportional to 642,199.96, 886,265.12 and 355,720.01

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Solution

The fourth proportional to 642,199.96, 886,265.12 and 355,720.01 is: 490,909.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,199.96 : 886,265.12 = 355,720.01 : x
  2. Step 2: Convert to fraction form
    642,199.96/886,265.12 = 355,720.01/x
  3. Step 3: Cross multiply
    642,199.96x = 886,265.12 × 355,720.01
  4. Step 4: Simplify right side
    642,199.96x = 315,262,235,570.45
  5. Step 5: Solve for x
    x = 315,262,235,570.45/642,199.96
  6. Step 6: Final answer
    x = 490,909.78

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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.