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Finding the Fourth Proportional to 2,707.60, 4,061.40 and 655.60

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Solution

The fourth proportional to 2,707.60, 4,061.40 and 655.60 is: 983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,707.60 : 4,061.40 = 655.60 : x
  2. Step 2: Convert to fraction form
    2,707.60/4,061.40 = 655.60/x
  3. Step 3: Cross multiply
    2,707.60x = 4,061.40 × 655.60
  4. Step 4: Simplify right side
    2,707.60x = 2,662,653.84
  5. Step 5: Solve for x
    x = 2,662,653.84/2,707.60
  6. Step 6: Final answer
    x = 983.40

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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.