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Finding the Fourth Proportional to 1,080.51, 1,620.36 and 349.89

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Solution

The fourth proportional to 1,080.51, 1,620.36 and 349.89 is: 524.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.51 : 1,620.36 = 349.89 : x
  2. Step 2: Convert to fraction form
    1,080.51/1,620.36 = 349.89/x
  3. Step 3: Cross multiply
    1,080.51x = 1,620.36 × 349.89
  4. Step 4: Simplify right side
    1,080.51x = 566,946.89
  5. Step 5: Solve for x
    x = 566,946.89/1,080.51
  6. Step 6: Final answer
    x = 524.70

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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.