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Finding the Fourth Proportional to 1,144.37, 1,579.05 and 647.00

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Solution

The fourth proportional to 1,144.37, 1,579.05 and 647.00 is: 892.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.37 : 1,579.05 = 647.00 : x
  2. Step 2: Convert to fraction form
    1,144.37/1,579.05 = 647.00/x
  3. Step 3: Cross multiply
    1,144.37x = 1,579.05 × 647.00
  4. Step 4: Simplify right side
    1,144.37x = 1,021,643.38
  5. Step 5: Solve for x
    x = 1,021,643.38/1,144.37
  6. Step 6: Final answer
    x = 892.75

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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.