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Finding the Fourth Proportional to 1,303.43, 1,799.01 and 861.39

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Solution

The fourth proportional to 1,303.43, 1,799.01 and 861.39 is: 1,188.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,303.43 : 1,799.01 = 861.39 : x
  2. Step 2: Convert to fraction form
    1,303.43/1,799.01 = 861.39/x
  3. Step 3: Cross multiply
    1,303.43x = 1,799.01 × 861.39
  4. Step 4: Simplify right side
    1,303.43x = 1,549,649.22
  5. Step 5: Solve for x
    x = 1,549,649.22/1,303.43
  6. Step 6: Final answer
    x = 1,188.91

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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.