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Finding the Fourth Proportional to 750.76, 1,126.06 and 317.80

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Solution

The fourth proportional to 750.76, 1,126.06 and 317.80 is: 476.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.76 : 1,126.06 = 317.80 : x
  2. Step 2: Convert to fraction form
    750.76/1,126.06 = 317.80/x
  3. Step 3: Cross multiply
    750.76x = 1,126.06 × 317.80
  4. Step 4: Simplify right side
    750.76x = 357,861.87
  5. Step 5: Solve for x
    x = 357,861.87/750.76
  6. Step 6: Final answer
    x = 476.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.