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Finding the Fourth Proportional to 393,834.60, 590,751.90 and 363,421.80

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Solution

The fourth proportional to 393,834.60, 590,751.90 and 363,421.80 is: 545,132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,834.60 : 590,751.90 = 363,421.80 : x
  2. Step 2: Convert to fraction form
    393,834.60/590,751.90 = 363,421.80/x
  3. Step 3: Cross multiply
    393,834.60x = 590,751.90 × 363,421.80
  4. Step 4: Simplify right side
    393,834.60x = 214,692,118,851.42
  5. Step 5: Solve for x
    x = 214,692,118,851.42/393,834.60
  6. Step 6: Final answer
    x = 545,132.70

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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.