Home / 1,298.14-1,945.05-911.50

Finding the Fourth Proportional to 1,298.14, 1,945.05 and 911.50

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Solution

The fourth proportional to 1,298.14, 1,945.05 and 911.50 is: 1,365.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.14 : 1,945.05 = 911.50 : x
  2. Step 2: Convert to fraction form
    1,298.14/1,945.05 = 911.50/x
  3. Step 3: Cross multiply
    1,298.14x = 1,945.05 × 911.50
  4. Step 4: Simplify right side
    1,298.14x = 1,772,913.08
  5. Step 5: Solve for x
    x = 1,772,913.08/1,298.14
  6. Step 6: Final answer
    x = 1,365.73

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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.