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Finding the Fourth Proportional to 485,321.48, 669,793.73 and 291,792.50

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Solution

The fourth proportional to 485,321.48, 669,793.73 and 291,792.50 is: 402,703.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,321.48 : 669,793.73 = 291,792.50 : x
  2. Step 2: Convert to fraction form
    485,321.48/669,793.73 = 291,792.50/x
  3. Step 3: Cross multiply
    485,321.48x = 669,793.73 × 291,792.50
  4. Step 4: Simplify right side
    485,321.48x = 195,440,786,961.03
  5. Step 5: Solve for x
    x = 195,440,786,961.03/485,321.48
  6. Step 6: Final answer
    x = 402,703.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.