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Finding the Fourth Proportional to 661,857.13, 990,778.21 and 598,703.86

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Solution

The fourth proportional to 661,857.13, 990,778.21 and 598,703.86 is: 896,239.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,857.13 : 990,778.21 = 598,703.86 : x
  2. Step 2: Convert to fraction form
    661,857.13/990,778.21 = 598,703.86/x
  3. Step 3: Cross multiply
    661,857.13x = 990,778.21 × 598,703.86
  4. Step 4: Simplify right side
    661,857.13x = 593,182,741,840.31
  5. Step 5: Solve for x
    x = 593,182,741,840.31/661,857.13
  6. Step 6: Final answer
    x = 896,239.86

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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.