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Finding the Fourth Proportional to 3,918.04, 5,405.04 and 2,425.40

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Solution

The fourth proportional to 3,918.04, 5,405.04 and 2,425.40 is: 3,345.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.04 : 5,405.04 = 2,425.40 : x
  2. Step 2: Convert to fraction form
    3,918.04/5,405.04 = 2,425.40/x
  3. Step 3: Cross multiply
    3,918.04x = 5,405.04 × 2,425.40
  4. Step 4: Simplify right side
    3,918.04x = 13,109,384.02
  5. Step 5: Solve for x
    x = 13,109,384.02/3,918.04
  6. Step 6: Final answer
    x = 3,345.90

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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.