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Finding the Fourth Proportional to 1,365.80, 2,045.84 and 772.07

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Solution

The fourth proportional to 1,365.80, 2,045.84 and 772.07 is: 1,156.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.80 : 2,045.84 = 772.07 : x
  2. Step 2: Convert to fraction form
    1,365.80/2,045.84 = 772.07/x
  3. Step 3: Cross multiply
    1,365.80x = 2,045.84 × 772.07
  4. Step 4: Simplify right side
    1,365.80x = 1,579,517.60
  5. Step 5: Solve for x
    x = 1,579,517.60/1,365.80
  6. Step 6: Final answer
    x = 1,156.48

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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.