Home / 1,348.08-2,018.36-688.54

Finding the Fourth Proportional to 1,348.08, 2,018.36 and 688.54

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Solution

The fourth proportional to 1,348.08, 2,018.36 and 688.54 is: 1,030.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.08 : 2,018.36 = 688.54 : x
  2. Step 2: Convert to fraction form
    1,348.08/2,018.36 = 688.54/x
  3. Step 3: Cross multiply
    1,348.08x = 2,018.36 × 688.54
  4. Step 4: Simplify right side
    1,348.08x = 1,389,721.59
  5. Step 5: Solve for x
    x = 1,389,721.59/1,348.08
  6. Step 6: Final answer
    x = 1,030.89

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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.