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Finding the Fourth Proportional to 389,172.90, 583,711.02 and 104,885.69

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Solution

The fourth proportional to 389,172.90, 583,711.02 and 104,885.69 is: 157,315.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,172.90 : 583,711.02 = 104,885.69 : x
  2. Step 2: Convert to fraction form
    389,172.90/583,711.02 = 104,885.69/x
  3. Step 3: Cross multiply
    389,172.90x = 583,711.02 × 104,885.69
  4. Step 4: Simplify right side
    389,172.90x = 61,222,930,174.75
  5. Step 5: Solve for x
    x = 61,222,930,174.75/389,172.90
  6. Step 6: Final answer
    x = 157,315.50

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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.