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Finding the Fourth Proportional to 661.37, 995.69 and 572.06

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Solution

The fourth proportional to 661.37, 995.69 and 572.06 is: 861.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.37 : 995.69 = 572.06 : x
  2. Step 2: Convert to fraction form
    661.37/995.69 = 572.06/x
  3. Step 3: Cross multiply
    661.37x = 995.69 × 572.06
  4. Step 4: Simplify right side
    661.37x = 569,598.34
  5. Step 5: Solve for x
    x = 569,598.34/661.37
  6. Step 6: Final answer
    x = 861.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.