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Finding the Fourth Proportional to 1,143.35, 1,577.83 and 619.39

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Solution

The fourth proportional to 1,143.35, 1,577.83 and 619.39 is: 854.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.35 : 1,577.83 = 619.39 : x
  2. Step 2: Convert to fraction form
    1,143.35/1,577.83 = 619.39/x
  3. Step 3: Cross multiply
    1,143.35x = 1,577.83 × 619.39
  4. Step 4: Simplify right side
    1,143.35x = 977,292.12
  5. Step 5: Solve for x
    x = 977,292.12/1,143.35
  6. Step 6: Final answer
    x = 854.76

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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.