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Finding the Fourth Proportional to 620.73, 931.16 and 312.32

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Solution

The fourth proportional to 620.73, 931.16 and 312.32 is: 468.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.73 : 931.16 = 312.32 : x
  2. Step 2: Convert to fraction form
    620.73/931.16 = 312.32/x
  3. Step 3: Cross multiply
    620.73x = 931.16 × 312.32
  4. Step 4: Simplify right side
    620.73x = 290,823.00
  5. Step 5: Solve for x
    x = 290,823.00/620.73
  6. Step 6: Final answer
    x = 468.52

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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.