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Finding the Fourth Proportional to 159.04, 219 and 145

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Solution

The fourth proportional to 159.04, 219 and 145 is: 199.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.04 : 219 = 145 : x
  2. Step 2: Convert to fraction form
    159.04/219 = 145/x
  3. Step 3: Cross multiply
    159.04x = 219 × 145
  4. Step 4: Simplify right side
    159.04x = 31,755
  5. Step 5: Solve for x
    x = 31,755/159.04
  6. Step 6: Final answer
    x = 199.67

Related Problems

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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.