Home / 1,178.15-1,762.56-1,039.64

Finding the Fourth Proportional to 1,178.15, 1,762.56 and 1,039.64

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Solution

The fourth proportional to 1,178.15, 1,762.56 and 1,039.64 is: 1,555.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.15 : 1,762.56 = 1,039.64 : x
  2. Step 2: Convert to fraction form
    1,178.15/1,762.56 = 1,039.64/x
  3. Step 3: Cross multiply
    1,178.15x = 1,762.56 × 1,039.64
  4. Step 4: Simplify right side
    1,178.15x = 1,832,419.07
  5. Step 5: Solve for x
    x = 1,832,419.07/1,178.15
  6. Step 6: Final answer
    x = 1,555.34

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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.