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Finding the Fourth Proportional to 693.49, 957.04 and 378.77

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Solution

The fourth proportional to 693.49, 957.04 and 378.77 is: 522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.49 : 957.04 = 378.77 : x
  2. Step 2: Convert to fraction form
    693.49/957.04 = 378.77/x
  3. Step 3: Cross multiply
    693.49x = 957.04 × 378.77
  4. Step 4: Simplify right side
    693.49x = 362,498.04
  5. Step 5: Solve for x
    x = 362,498.04/693.49
  6. Step 6: Final answer
    x = 522.72

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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.