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Finding the Fourth Proportional to 693.90, 958.30 and 484.61

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Solution

The fourth proportional to 693.90, 958.30 and 484.61 is: 669.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.90 : 958.30 = 484.61 : x
  2. Step 2: Convert to fraction form
    693.90/958.30 = 484.61/x
  3. Step 3: Cross multiply
    693.90x = 958.30 × 484.61
  4. Step 4: Simplify right side
    693.90x = 464,395.76
  5. Step 5: Solve for x
    x = 464,395.76/693.90
  6. Step 6: Final answer
    x = 669.25

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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.