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Finding the Fourth Proportional to 612.97, 919.62 and 356.25

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Solution

The fourth proportional to 612.97, 919.62 and 356.25 is: 534.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.97 : 919.62 = 356.25 : x
  2. Step 2: Convert to fraction form
    612.97/919.62 = 356.25/x
  3. Step 3: Cross multiply
    612.97x = 919.62 × 356.25
  4. Step 4: Simplify right side
    612.97x = 327,614.63
  5. Step 5: Solve for x
    x = 327,614.63/612.97
  6. Step 6: Final answer
    x = 534.47

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Half scale
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Double scale
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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.