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Finding the Fourth Proportional to 633.63, 874.76 and 400.89

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Solution

The fourth proportional to 633.63, 874.76 and 400.89 is: 553.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.63 : 874.76 = 400.89 : x
  2. Step 2: Convert to fraction form
    633.63/874.76 = 400.89/x
  3. Step 3: Cross multiply
    633.63x = 874.76 × 400.89
  4. Step 4: Simplify right side
    633.63x = 350,680.53
  5. Step 5: Solve for x
    x = 350,680.53/633.63
  6. Step 6: Final answer
    x = 553.45

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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.