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Finding the Fourth Proportional to 697.55, 1,045.21 and 368.47

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Solution

The fourth proportional to 697.55, 1,045.21 and 368.47 is: 552.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.55 : 1,045.21 = 368.47 : x
  2. Step 2: Convert to fraction form
    697.55/1,045.21 = 368.47/x
  3. Step 3: Cross multiply
    697.55x = 1,045.21 × 368.47
  4. Step 4: Simplify right side
    697.55x = 385,128.91
  5. Step 5: Solve for x
    x = 385,128.91/697.55
  6. Step 6: Final answer
    x = 552.12

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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.