Home / 3,117.89-4,302.51-1,720.64

Finding the Fourth Proportional to 3,117.89, 4,302.51 and 1,720.64

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Solution

The fourth proportional to 3,117.89, 4,302.51 and 1,720.64 is: 2,374.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.89 : 4,302.51 = 1,720.64 : x
  2. Step 2: Convert to fraction form
    3,117.89/4,302.51 = 1,720.64/x
  3. Step 3: Cross multiply
    3,117.89x = 4,302.51 × 1,720.64
  4. Step 4: Simplify right side
    3,117.89x = 7,403,070.81
  5. Step 5: Solve for x
    x = 7,403,070.81/3,117.89
  6. Step 6: Final answer
    x = 2,374.38

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Double scale
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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.