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Finding the Fourth Proportional to 1,213.90, 1,820.86 and 348.24

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Solution

The fourth proportional to 1,213.90, 1,820.86 and 348.24 is: 522.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.90 : 1,820.86 = 348.24 : x
  2. Step 2: Convert to fraction form
    1,213.90/1,820.86 = 348.24/x
  3. Step 3: Cross multiply
    1,213.90x = 1,820.86 × 348.24
  4. Step 4: Simplify right side
    1,213.90x = 634,096.29
  5. Step 5: Solve for x
    x = 634,096.29/1,213.90
  6. Step 6: Final answer
    x = 522.36

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1.5x scale

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.