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Finding the Fourth Proportional to 2,804.61, 4,206.51 and 856.83

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Solution

The fourth proportional to 2,804.61, 4,206.51 and 856.83 is: 1,285.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,804.61 : 4,206.51 = 856.83 : x
  2. Step 2: Convert to fraction form
    2,804.61/4,206.51 = 856.83/x
  3. Step 3: Cross multiply
    2,804.61x = 4,206.51 × 856.83
  4. Step 4: Simplify right side
    2,804.61x = 3,604,263.96
  5. Step 5: Solve for x
    x = 3,604,263.96/2,804.61
  6. Step 6: Final answer
    x = 1,285.12

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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.