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Finding the Fourth Proportional to 2,378.77, 3,568.15 and 647.39

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Solution

The fourth proportional to 2,378.77, 3,568.15 and 647.39 is: 971.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.77 : 3,568.15 = 647.39 : x
  2. Step 2: Convert to fraction form
    2,378.77/3,568.15 = 647.39/x
  3. Step 3: Cross multiply
    2,378.77x = 3,568.15 × 647.39
  4. Step 4: Simplify right side
    2,378.77x = 2,309,984.63
  5. Step 5: Solve for x
    x = 2,309,984.63/2,378.77
  6. Step 6: Final answer
    x = 971.08

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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.