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Finding the Fourth Proportional to 2,386.92, 3,580.20 and 655.68

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Solution

The fourth proportional to 2,386.92, 3,580.20 and 655.68 is: 983.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.92 : 3,580.20 = 655.68 : x
  2. Step 2: Convert to fraction form
    2,386.92/3,580.20 = 655.68/x
  3. Step 3: Cross multiply
    2,386.92x = 3,580.20 × 655.68
  4. Step 4: Simplify right side
    2,386.92x = 2,347,465.54
  5. Step 5: Solve for x
    x = 2,347,465.54/2,386.92
  6. Step 6: Final answer
    x = 983.47

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1.5x scale

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.