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Finding the Fourth Proportional to 1,349.52, 2,021.58 and 618.09

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Solution

The fourth proportional to 1,349.52, 2,021.58 and 618.09 is: 925.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.52 : 2,021.58 = 618.09 : x
  2. Step 2: Convert to fraction form
    1,349.52/2,021.58 = 618.09/x
  3. Step 3: Cross multiply
    1,349.52x = 2,021.58 × 618.09
  4. Step 4: Simplify right side
    1,349.52x = 1,249,518.38
  5. Step 5: Solve for x
    x = 1,249,518.38/1,349.52
  6. Step 6: Final answer
    x = 925.90

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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.