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Finding the Fourth Proportional to 697.68, 962.55 and 402.89

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Solution

The fourth proportional to 697.68, 962.55 and 402.89 is: 555.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.68 : 962.55 = 402.89 : x
  2. Step 2: Convert to fraction form
    697.68/962.55 = 402.89/x
  3. Step 3: Cross multiply
    697.68x = 962.55 × 402.89
  4. Step 4: Simplify right side
    697.68x = 387,796.96
  5. Step 5: Solve for x
    x = 387,796.96/697.68
  6. Step 6: Final answer
    x = 555.84

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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.