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Finding the Fourth Proportional to 1,314.65, 1,971.82 and 340.67

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Solution

The fourth proportional to 1,314.65, 1,971.82 and 340.67 is: 510.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.65 : 1,971.82 = 340.67 : x
  2. Step 2: Convert to fraction form
    1,314.65/1,971.82 = 340.67/x
  3. Step 3: Cross multiply
    1,314.65x = 1,971.82 × 340.67
  4. Step 4: Simplify right side
    1,314.65x = 671,738.22
  5. Step 5: Solve for x
    x = 671,738.22/1,314.65
  6. Step 6: Final answer
    x = 510.97

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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.