Home / 1,307.36-1,961.37-485.87

Finding the Fourth Proportional to 1,307.36, 1,961.37 and 485.87

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Solution

The fourth proportional to 1,307.36, 1,961.37 and 485.87 is: 728.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.36 : 1,961.37 = 485.87 : x
  2. Step 2: Convert to fraction form
    1,307.36/1,961.37 = 485.87/x
  3. Step 3: Cross multiply
    1,307.36x = 1,961.37 × 485.87
  4. Step 4: Simplify right side
    1,307.36x = 952,962.25
  5. Step 5: Solve for x
    x = 952,962.25/1,307.36
  6. Step 6: Final answer
    x = 728.92

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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.