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Finding the Fourth Proportional to 3,118.42, 4,303.38 and 1,721.08

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Solution

The fourth proportional to 3,118.42, 4,303.38 and 1,721.08 is: 2,375.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.42 : 4,303.38 = 1,721.08 : x
  2. Step 2: Convert to fraction form
    3,118.42/4,303.38 = 1,721.08/x
  3. Step 3: Cross multiply
    3,118.42x = 4,303.38 × 1,721.08
  4. Step 4: Simplify right side
    3,118.42x = 7,406,461.25
  5. Step 5: Solve for x
    x = 7,406,461.25/3,118.42
  6. Step 6: Final answer
    x = 2,375.07

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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.