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Finding the Fourth Proportional to 1,479.46, 2,219.31 and 785.62

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Solution

The fourth proportional to 1,479.46, 2,219.31 and 785.62 is: 1,178.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.46 : 2,219.31 = 785.62 : x
  2. Step 2: Convert to fraction form
    1,479.46/2,219.31 = 785.62/x
  3. Step 3: Cross multiply
    1,479.46x = 2,219.31 × 785.62
  4. Step 4: Simplify right side
    1,479.46x = 1,743,534.32
  5. Step 5: Solve for x
    x = 1,743,534.32/1,479.46
  6. Step 6: Final answer
    x = 1,178.49

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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.