Home / 1,720.60-2,572.80-1,283.20

Finding the Fourth Proportional to 1,720.60, 2,572.80 and 1,283.20

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Solution

The fourth proportional to 1,720.60, 2,572.80 and 1,283.20 is: 1,918.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.60 : 2,572.80 = 1,283.20 : x
  2. Step 2: Convert to fraction form
    1,720.60/2,572.80 = 1,283.20/x
  3. Step 3: Cross multiply
    1,720.60x = 2,572.80 × 1,283.20
  4. Step 4: Simplify right side
    1,720.60x = 3,301,416.96
  5. Step 5: Solve for x
    x = 3,301,416.96/1,720.60
  6. Step 6: Final answer
    x = 1,918.76

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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.