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Finding the Fourth Proportional to 953.25, 1,430.42 and 440.25

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Solution

The fourth proportional to 953.25, 1,430.42 and 440.25 is: 660.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.25 : 1,430.42 = 440.25 : x
  2. Step 2: Convert to fraction form
    953.25/1,430.42 = 440.25/x
  3. Step 3: Cross multiply
    953.25x = 1,430.42 × 440.25
  4. Step 4: Simplify right side
    953.25x = 629,742.41
  5. Step 5: Solve for x
    x = 629,742.41/953.25
  6. Step 6: Final answer
    x = 660.63

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Half scale
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Double scale
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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.