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Finding the Fourth Proportional to 688.96, 951.20 and 427.04

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Solution

The fourth proportional to 688.96, 951.20 and 427.04 is: 589.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.96 : 951.20 = 427.04 : x
  2. Step 2: Convert to fraction form
    688.96/951.20 = 427.04/x
  3. Step 3: Cross multiply
    688.96x = 951.20 × 427.04
  4. Step 4: Simplify right side
    688.96x = 406,200.45
  5. Step 5: Solve for x
    x = 406,200.45/688.96
  6. Step 6: Final answer
    x = 589.58

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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.