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Finding the Fourth Proportional to 485,486.53, 669,658.75 and 322,139.50

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Solution

The fourth proportional to 485,486.53, 669,658.75 and 322,139.50 is: 444,345.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,486.53 : 669,658.75 = 322,139.50 : x
  2. Step 2: Convert to fraction form
    485,486.53/669,658.75 = 322,139.50/x
  3. Step 3: Cross multiply
    485,486.53x = 669,658.75 × 322,139.50
  4. Step 4: Simplify right side
    485,486.53x = 215,723,532,416.13
  5. Step 5: Solve for x
    x = 215,723,532,416.13/485,486.53
  6. Step 6: Final answer
    x = 444,345.04

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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.