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Finding the Fourth Proportional to 661.38, 913.08 and 440.52

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Solution

The fourth proportional to 661.38, 913.08 and 440.52 is: 608.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.38 : 913.08 = 440.52 : x
  2. Step 2: Convert to fraction form
    661.38/913.08 = 440.52/x
  3. Step 3: Cross multiply
    661.38x = 913.08 × 440.52
  4. Step 4: Simplify right side
    661.38x = 402,230.00
  5. Step 5: Solve for x
    x = 402,230.00/661.38
  6. Step 6: Final answer
    x = 608.17

Related Problems

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Half scale
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Double scale
Find fourth proportional to 662.38, 914.46 and 441.52
Similar ratio
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1.5x scale

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.