Home / 665,345.41-918,175.77-378,865.50

Finding the Fourth Proportional to 665,345.41, 918,175.77 and 378,865.50

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Solution

The fourth proportional to 665,345.41, 918,175.77 and 378,865.50 is: 522,833.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,345.41 : 918,175.77 = 378,865.50 : x
  2. Step 2: Convert to fraction form
    665,345.41/918,175.77 = 378,865.50/x
  3. Step 3: Cross multiply
    665,345.41x = 918,175.77 × 378,865.50
  4. Step 4: Simplify right side
    665,345.41x = 347,865,120,294.61
  5. Step 5: Solve for x
    x = 347,865,120,294.61/665,345.41
  6. Step 6: Final answer
    x = 522,833.88

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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.