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Finding the Fourth Proportional to 2,345.62, 3,518.64 and 785.56

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Solution

The fourth proportional to 2,345.62, 3,518.64 and 785.56 is: 1,178.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,345.62 : 3,518.64 = 785.56 : x
  2. Step 2: Convert to fraction form
    2,345.62/3,518.64 = 785.56/x
  3. Step 3: Cross multiply
    2,345.62x = 3,518.64 × 785.56
  4. Step 4: Simplify right side
    2,345.62x = 2,764,102.84
  5. Step 5: Solve for x
    x = 2,764,102.84/2,345.62
  6. Step 6: Final answer
    x = 1,178.41

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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.