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Finding the Fourth Proportional to 526.76, 726.63 and 305.69

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Solution

The fourth proportional to 526.76, 726.63 and 305.69 is: 421.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.76 : 726.63 = 305.69 : x
  2. Step 2: Convert to fraction form
    526.76/726.63 = 305.69/x
  3. Step 3: Cross multiply
    526.76x = 726.63 × 305.69
  4. Step 4: Simplify right side
    526.76x = 222,119.89
  5. Step 5: Solve for x
    x = 222,119.89/526.76
  6. Step 6: Final answer
    x = 421.67

Related Problems

Find fourth proportional to 263.38, 363.32 and 152.84
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Double scale
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Similar ratio
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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.