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Finding the Fourth Proportional to 2,807.46, 4,210.58 and 859.21

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Solution

The fourth proportional to 2,807.46, 4,210.58 and 859.21 is: 1,288.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.46 : 4,210.58 = 859.21 : x
  2. Step 2: Convert to fraction form
    2,807.46/4,210.58 = 859.21/x
  3. Step 3: Cross multiply
    2,807.46x = 4,210.58 × 859.21
  4. Step 4: Simplify right side
    2,807.46x = 3,617,764.06
  5. Step 5: Solve for x
    x = 3,617,764.06/2,807.46
  6. Step 6: Final answer
    x = 1,288.63

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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.