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Finding the Fourth Proportional to 657.86, 986.58 and 247.05

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Solution

The fourth proportional to 657.86, 986.58 and 247.05 is: 370.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.86 : 986.58 = 247.05 : x
  2. Step 2: Convert to fraction form
    657.86/986.58 = 247.05/x
  3. Step 3: Cross multiply
    657.86x = 986.58 × 247.05
  4. Step 4: Simplify right side
    657.86x = 243,734.59
  5. Step 5: Solve for x
    x = 243,734.59/657.86
  6. Step 6: Final answer
    x = 370.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 658.86, 988.08 and 248.05
Similar ratio
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1.5x scale

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.