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Finding the Fourth Proportional to 693.76, 957.40 and 383.24

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Solution

The fourth proportional to 693.76, 957.40 and 383.24 is: 528.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.76 : 957.40 = 383.24 : x
  2. Step 2: Convert to fraction form
    693.76/957.40 = 383.24/x
  3. Step 3: Cross multiply
    693.76x = 957.40 × 383.24
  4. Step 4: Simplify right side
    693.76x = 366,913.98
  5. Step 5: Solve for x
    x = 366,913.98/693.76
  6. Step 6: Final answer
    x = 528.88

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Double scale
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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.