Home / 1,307.05-1,961.23-485.51

Finding the Fourth Proportional to 1,307.05, 1,961.23 and 485.51

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Solution

The fourth proportional to 1,307.05, 1,961.23 and 485.51 is: 728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.05 : 1,961.23 = 485.51 : x
  2. Step 2: Convert to fraction form
    1,307.05/1,961.23 = 485.51/x
  3. Step 3: Cross multiply
    1,307.05x = 1,961.23 × 485.51
  4. Step 4: Simplify right side
    1,307.05x = 952,185.76
  5. Step 5: Solve for x
    x = 952,185.76/1,307.05
  6. Step 6: Final answer
    x = 728.50

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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.