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Finding the Fourth Proportional to 390,900.60, 587,603.70 and 363,166.20

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Solution

The fourth proportional to 390,900.60, 587,603.70 and 363,166.20 is: 545,913.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,900.60 : 587,603.70 = 363,166.20 : x
  2. Step 2: Convert to fraction form
    390,900.60/587,603.70 = 363,166.20/x
  3. Step 3: Cross multiply
    390,900.60x = 587,603.70 × 363,166.20
  4. Step 4: Simplify right side
    390,900.60x = 213,397,802,834.94
  5. Step 5: Solve for x
    x = 213,397,802,834.94/390,900.60
  6. Step 6: Final answer
    x = 545,913.21

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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.