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Finding the Fourth Proportional to 2,316.63, 3,476.31 and 856.80

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Solution

The fourth proportional to 2,316.63, 3,476.31 and 856.80 is: 1,285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,316.63 : 3,476.31 = 856.80 : x
  2. Step 2: Convert to fraction form
    2,316.63/3,476.31 = 856.80/x
  3. Step 3: Cross multiply
    2,316.63x = 3,476.31 × 856.80
  4. Step 4: Simplify right side
    2,316.63x = 2,978,502.41
  5. Step 5: Solve for x
    x = 2,978,502.41/2,316.63
  6. Step 6: Final answer
    x = 1,285.70

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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.