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Finding the Fourth Proportional to 391,281.60, 587,141.10 and 166,603.80

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Solution

The fourth proportional to 391,281.60, 587,141.10 and 166,603.80 is: 249,998.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,281.60 : 587,141.10 = 166,603.80 : x
  2. Step 2: Convert to fraction form
    391,281.60/587,141.10 = 166,603.80/x
  3. Step 3: Cross multiply
    391,281.60x = 587,141.10 × 166,603.80
  4. Step 4: Simplify right side
    391,281.60x = 97,819,938,396.18
  5. Step 5: Solve for x
    x = 97,819,938,396.18/391,281.60
  6. Step 6: Final answer
    x = 249,998.82

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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.