Home / 1,187.36-1,783.20-914.12

Finding the Fourth Proportional to 1,187.36, 1,783.20 and 914.12

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Solution

The fourth proportional to 1,187.36, 1,783.20 and 914.12 is: 1,372.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.36 : 1,783.20 = 914.12 : x
  2. Step 2: Convert to fraction form
    1,187.36/1,783.20 = 914.12/x
  3. Step 3: Cross multiply
    1,187.36x = 1,783.20 × 914.12
  4. Step 4: Simplify right side
    1,187.36x = 1,630,058.78
  5. Step 5: Solve for x
    x = 1,630,058.78/1,187.36
  6. Step 6: Final answer
    x = 1,372.84

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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.