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Finding the Fourth Proportional to 456,686.91, 685,445.90 and 243,635.45

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Solution

The fourth proportional to 456,686.91, 685,445.90 and 243,635.45 is: 365,674.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,686.91 : 685,445.90 = 243,635.45 : x
  2. Step 2: Convert to fraction form
    456,686.91/685,445.90 = 243,635.45/x
  3. Step 3: Cross multiply
    456,686.91x = 685,445.90 × 243,635.45
  4. Step 4: Simplify right side
    456,686.91x = 166,998,915,651.75
  5. Step 5: Solve for x
    x = 166,998,915,651.75/456,686.91
  6. Step 6: Final answer
    x = 365,674.85

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1.5x scale

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.