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Finding the Fourth Proportional to 289,564.80, 434,404.80 and 243,139.20

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Solution

The fourth proportional to 289,564.80, 434,404.80 and 243,139.20 is: 364,757.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,564.80 : 434,404.80 = 243,139.20 : x
  2. Step 2: Convert to fraction form
    289,564.80/434,404.80 = 243,139.20/x
  3. Step 3: Cross multiply
    289,564.80x = 434,404.80 × 243,139.20
  4. Step 4: Simplify right side
    289,564.80x = 105,620,835,548.16
  5. Step 5: Solve for x
    x = 105,620,835,548.16/289,564.80
  6. Step 6: Final answer
    x = 364,757.17

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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.