Home / 1,720.61-2,578.85-1,127.93

Finding the Fourth Proportional to 1,720.61, 2,578.85 and 1,127.93

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Solution

The fourth proportional to 1,720.61, 2,578.85 and 1,127.93 is: 1,690.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.61 : 2,578.85 = 1,127.93 : x
  2. Step 2: Convert to fraction form
    1,720.61/2,578.85 = 1,127.93/x
  3. Step 3: Cross multiply
    1,720.61x = 2,578.85 × 1,127.93
  4. Step 4: Simplify right side
    1,720.61x = 2,908,762.28
  5. Step 5: Solve for x
    x = 2,908,762.28/1,720.61
  6. Step 6: Final answer
    x = 1,690.54

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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.