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Finding the Fourth Proportional to 670.19, 1,003.14 and 361.58

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Solution

The fourth proportional to 670.19, 1,003.14 and 361.58 is: 541.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.19 : 1,003.14 = 361.58 : x
  2. Step 2: Convert to fraction form
    670.19/1,003.14 = 361.58/x
  3. Step 3: Cross multiply
    670.19x = 1,003.14 × 361.58
  4. Step 4: Simplify right side
    670.19x = 362,710.35
  5. Step 5: Solve for x
    x = 362,710.35/670.19
  6. Step 6: Final answer
    x = 541.21

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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.