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Finding the Fourth Proportional to 427,647.60, 641,613.93 and 143,366.28

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Solution

The fourth proportional to 427,647.60, 641,613.93 and 143,366.28 is: 215,097.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,647.60 : 641,613.93 = 143,366.28 : x
  2. Step 2: Convert to fraction form
    427,647.60/641,613.93 = 143,366.28/x
  3. Step 3: Cross multiply
    427,647.60x = 641,613.93 × 143,366.28
  4. Step 4: Simplify right side
    427,647.60x = 91,985,802,340.28
  5. Step 5: Solve for x
    x = 91,985,802,340.28/427,647.60
  6. Step 6: Final answer
    x = 215,097.20

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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.