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Finding the Fourth Proportional to 693.89, 957.46 and 428.25

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Solution

The fourth proportional to 693.89, 957.46 and 428.25 is: 590.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.89 : 957.46 = 428.25 : x
  2. Step 2: Convert to fraction form
    693.89/957.46 = 428.25/x
  3. Step 3: Cross multiply
    693.89x = 957.46 × 428.25
  4. Step 4: Simplify right side
    693.89x = 410,032.25
  5. Step 5: Solve for x
    x = 410,032.25/693.89
  6. Step 6: Final answer
    x = 590.92

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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.