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Finding the Fourth Proportional to 421,385.60, 630,542.40 and 310,793.60

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Solution

The fourth proportional to 421,385.60, 630,542.40 and 310,793.60 is: 465,057.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,385.60 : 630,542.40 = 310,793.60 : x
  2. Step 2: Convert to fraction form
    421,385.60/630,542.40 = 310,793.60/x
  3. Step 3: Cross multiply
    421,385.60x = 630,542.40 × 310,793.60
  4. Step 4: Simplify right side
    421,385.60x = 195,968,542,448.64
  5. Step 5: Solve for x
    x = 195,968,542,448.64/421,385.60
  6. Step 6: Final answer
    x = 465,057.52

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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.