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Finding the Fourth Proportional to 856.61, 1,182.11 and 483.64

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Solution

The fourth proportional to 856.61, 1,182.11 and 483.64 is: 667.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.61 : 1,182.11 = 483.64 : x
  2. Step 2: Convert to fraction form
    856.61/1,182.11 = 483.64/x
  3. Step 3: Cross multiply
    856.61x = 1,182.11 × 483.64
  4. Step 4: Simplify right side
    856.61x = 571,710.31
  5. Step 5: Solve for x
    x = 571,710.31/856.61
  6. Step 6: Final answer
    x = 667.41

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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.