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Finding the Fourth Proportional to 485,670.66, 729,139.53 and 326,459.79

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Solution

The fourth proportional to 485,670.66, 729,139.53 and 326,459.79 is: 490,115.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,670.66 : 729,139.53 = 326,459.79 : x
  2. Step 2: Convert to fraction form
    485,670.66/729,139.53 = 326,459.79/x
  3. Step 3: Cross multiply
    485,670.66x = 729,139.53 × 326,459.79
  4. Step 4: Simplify right side
    485,670.66x = 238,034,737,844.50
  5. Step 5: Solve for x
    x = 238,034,737,844.50/485,670.66
  6. Step 6: Final answer
    x = 490,115.54

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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.