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Finding the Fourth Proportional to 1,170.31, 1,754.65 and 520.69

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Solution

The fourth proportional to 1,170.31, 1,754.65 and 520.69 is: 780.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.31 : 1,754.65 = 520.69 : x
  2. Step 2: Convert to fraction form
    1,170.31/1,754.65 = 520.69/x
  3. Step 3: Cross multiply
    1,170.31x = 1,754.65 × 520.69
  4. Step 4: Simplify right side
    1,170.31x = 913,628.71
  5. Step 5: Solve for x
    x = 913,628.71/1,170.31
  6. Step 6: Final answer
    x = 780.67

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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.