Home / 1,511.34-2,084.67-987.18

Finding the Fourth Proportional to 1,511.34, 2,084.67 and 987.18

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Solution

The fourth proportional to 1,511.34, 2,084.67 and 987.18 is: 1,361.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.34 : 2,084.67 = 987.18 : x
  2. Step 2: Convert to fraction form
    1,511.34/2,084.67 = 987.18/x
  3. Step 3: Cross multiply
    1,511.34x = 2,084.67 × 987.18
  4. Step 4: Simplify right side
    1,511.34x = 2,057,944.53
  5. Step 5: Solve for x
    x = 2,057,944.53/1,511.34
  6. Step 6: Final answer
    x = 1,361.67

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,512.34, 2,086.05 and 988.18
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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.