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Finding the Fourth Proportional to 697.88, 1,045.90 and 523.18

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Solution

The fourth proportional to 697.88, 1,045.90 and 523.18 is: 784.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.88 : 1,045.90 = 523.18 : x
  2. Step 2: Convert to fraction form
    697.88/1,045.90 = 523.18/x
  3. Step 3: Cross multiply
    697.88x = 1,045.90 × 523.18
  4. Step 4: Simplify right side
    697.88x = 547,193.96
  5. Step 5: Solve for x
    x = 547,193.96/697.88
  6. Step 6: Final answer
    x = 784.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.