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Finding the Fourth Proportional to 876.37, 1,211.14 and 718.76

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Solution

The fourth proportional to 876.37, 1,211.14 and 718.76 is: 993.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.37 : 1,211.14 = 718.76 : x
  2. Step 2: Convert to fraction form
    876.37/1,211.14 = 718.76/x
  3. Step 3: Cross multiply
    876.37x = 1,211.14 × 718.76
  4. Step 4: Simplify right side
    876.37x = 870,518.99
  5. Step 5: Solve for x
    x = 870,518.99/876.37
  6. Step 6: Final answer
    x = 993.32

Related Problems

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Half scale
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Double scale
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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.