Home / 1,351.02-1,865.13-911.25

Finding the Fourth Proportional to 1,351.02, 1,865.13 and 911.25

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Solution

The fourth proportional to 1,351.02, 1,865.13 and 911.25 is: 1,258.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.02 : 1,865.13 = 911.25 : x
  2. Step 2: Convert to fraction form
    1,351.02/1,865.13 = 911.25/x
  3. Step 3: Cross multiply
    1,351.02x = 1,865.13 × 911.25
  4. Step 4: Simplify right side
    1,351.02x = 1,699,599.71
  5. Step 5: Solve for x
    x = 1,699,599.71/1,351.02
  6. Step 6: Final answer
    x = 1,258.01

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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.