Home / 1,720.72-2,374.62-934.78

Finding the Fourth Proportional to 1,720.72, 2,374.62 and 934.78

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Solution

The fourth proportional to 1,720.72, 2,374.62 and 934.78 is: 1,290.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.72 : 2,374.62 = 934.78 : x
  2. Step 2: Convert to fraction form
    1,720.72/2,374.62 = 934.78/x
  3. Step 3: Cross multiply
    1,720.72x = 2,374.62 × 934.78
  4. Step 4: Simplify right side
    1,720.72x = 2,219,747.28
  5. Step 5: Solve for x
    x = 2,219,747.28/1,720.72
  6. Step 6: Final answer
    x = 1,290.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.