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Finding the Fourth Proportional to 670.19, 1,004.47 and 284.63

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Solution

The fourth proportional to 670.19, 1,004.47 and 284.63 is: 426.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.19 : 1,004.47 = 284.63 : x
  2. Step 2: Convert to fraction form
    670.19/1,004.47 = 284.63/x
  3. Step 3: Cross multiply
    670.19x = 1,004.47 × 284.63
  4. Step 4: Simplify right side
    670.19x = 285,896.56
  5. Step 5: Solve for x
    x = 285,896.56/670.19
  6. Step 6: Final answer
    x = 426.59

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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.