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Finding the Fourth Proportional to 347,790.60, 521,685.90 and 318,630.60

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Solution

The fourth proportional to 347,790.60, 521,685.90 and 318,630.60 is: 477,945.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,790.60 : 521,685.90 = 318,630.60 : x
  2. Step 2: Convert to fraction form
    347,790.60/521,685.90 = 318,630.60/x
  3. Step 3: Cross multiply
    347,790.60x = 521,685.90 × 318,630.60
  4. Step 4: Simplify right side
    347,790.60x = 166,225,091,328.54
  5. Step 5: Solve for x
    x = 166,225,091,328.54/347,790.60
  6. Step 6: Final answer
    x = 477,945.90

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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.