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Finding the Fourth Proportional to 1,297.64, 1,944.57 and 647.48

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Solution

The fourth proportional to 1,297.64, 1,944.57 and 647.48 is: 970.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.64 : 1,944.57 = 647.48 : x
  2. Step 2: Convert to fraction form
    1,297.64/1,944.57 = 647.48/x
  3. Step 3: Cross multiply
    1,297.64x = 1,944.57 × 647.48
  4. Step 4: Simplify right side
    1,297.64x = 1,259,070.18
  5. Step 5: Solve for x
    x = 1,259,070.18/1,297.64
  6. Step 6: Final answer
    x = 970.28

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1.5x scale

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.