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Finding the Fourth Proportional to 666.86, 995.46 and 573.30

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Solution

The fourth proportional to 666.86, 995.46 and 573.30 is: 855.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.86 : 995.46 = 573.30 : x
  2. Step 2: Convert to fraction form
    666.86/995.46 = 573.30/x
  3. Step 3: Cross multiply
    666.86x = 995.46 × 573.30
  4. Step 4: Simplify right side
    666.86x = 570,697.22
  5. Step 5: Solve for x
    x = 570,697.22/666.86
  6. Step 6: Final answer
    x = 855.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.