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Finding the Fourth Proportional to 545,426.40, 818,139.60 and 171,449.40

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Solution

The fourth proportional to 545,426.40, 818,139.60 and 171,449.40 is: 257,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,426.40 : 818,139.60 = 171,449.40 : x
  2. Step 2: Convert to fraction form
    545,426.40/818,139.60 = 171,449.40/x
  3. Step 3: Cross multiply
    545,426.40x = 818,139.60 × 171,449.40
  4. Step 4: Simplify right side
    545,426.40x = 140,269,543,536.24
  5. Step 5: Solve for x
    x = 140,269,543,536.24/545,426.40
  6. Step 6: Final answer
    x = 257,174.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.