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Finding the Fourth Proportional to 856.80, 1,180.36 and 706.44

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Solution

The fourth proportional to 856.80, 1,180.36 and 706.44 is: 973.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.80 : 1,180.36 = 706.44 : x
  2. Step 2: Convert to fraction form
    856.80/1,180.36 = 706.44/x
  3. Step 3: Cross multiply
    856.80x = 1,180.36 × 706.44
  4. Step 4: Simplify right side
    856.80x = 833,856.18
  5. Step 5: Solve for x
    x = 833,856.18/856.80
  6. Step 6: Final answer
    x = 973.22

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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.