Home / 3,117.89-4,302.67-1,720.63

Finding the Fourth Proportional to 3,117.89, 4,302.67 and 1,720.63

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Solution

The fourth proportional to 3,117.89, 4,302.67 and 1,720.63 is: 2,374.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.89 : 4,302.67 = 1,720.63 : x
  2. Step 2: Convert to fraction form
    3,117.89/4,302.67 = 1,720.63/x
  3. Step 3: Cross multiply
    3,117.89x = 4,302.67 × 1,720.63
  4. Step 4: Simplify right side
    3,117.89x = 7,403,285.87
  5. Step 5: Solve for x
    x = 7,403,285.87/3,117.89
  6. Step 6: Final answer
    x = 2,374.46

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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.