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Finding the Fourth Proportional to 856.82, 1,182.41 and 483.80

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Solution

The fourth proportional to 856.82, 1,182.41 and 483.80 is: 667.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.82 : 1,182.41 = 483.80 : x
  2. Step 2: Convert to fraction form
    856.82/1,182.41 = 483.80/x
  3. Step 3: Cross multiply
    856.82x = 1,182.41 × 483.80
  4. Step 4: Simplify right side
    856.82x = 572,041.63
  5. Step 5: Solve for x
    x = 572,041.63/856.82
  6. Step 6: Final answer
    x = 667.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.