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Finding the Fourth Proportional to 693.88, 957.58 and 383.40

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Solution

The fourth proportional to 693.88, 957.58 and 383.40 is: 529.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.88 : 957.58 = 383.40 : x
  2. Step 2: Convert to fraction form
    693.88/957.58 = 383.40/x
  3. Step 3: Cross multiply
    693.88x = 957.58 × 383.40
  4. Step 4: Simplify right side
    693.88x = 367,136.17
  5. Step 5: Solve for x
    x = 367,136.17/693.88
  6. Step 6: Final answer
    x = 529.11

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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.