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Finding the Fourth Proportional to 1,465.70, 2,196.59 and 772.20

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Solution

The fourth proportional to 1,465.70, 2,196.59 and 772.20 is: 1,157.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,465.70 : 2,196.59 = 772.20 : x
  2. Step 2: Convert to fraction form
    1,465.70/2,196.59 = 772.20/x
  3. Step 3: Cross multiply
    1,465.70x = 2,196.59 × 772.20
  4. Step 4: Simplify right side
    1,465.70x = 1,696,202.94
  5. Step 5: Solve for x
    x = 1,696,202.94/1,465.70
  6. Step 6: Final answer
    x = 1,157.27

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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.