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Finding the Fourth Proportional to 667,509.29, 921,163.86 and 395,710.74

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Solution

The fourth proportional to 667,509.29, 921,163.86 and 395,710.74 is: 546,081.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,509.29 : 921,163.86 = 395,710.74 : x
  2. Step 2: Convert to fraction form
    667,509.29/921,163.86 = 395,710.74/x
  3. Step 3: Cross multiply
    667,509.29x = 921,163.86 × 395,710.74
  4. Step 4: Simplify right side
    667,509.29x = 364,514,432,701.86
  5. Step 5: Solve for x
    x = 364,514,432,701.86/667,509.29
  6. Step 6: Final answer
    x = 546,081.44

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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.