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Finding the Fourth Proportional to 2,386.69, 3,580.29 and 655.31

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Solution

The fourth proportional to 2,386.69, 3,580.29 and 655.31 is: 983.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.69 : 3,580.29 = 655.31 : x
  2. Step 2: Convert to fraction form
    2,386.69/3,580.29 = 655.31/x
  3. Step 3: Cross multiply
    2,386.69x = 3,580.29 × 655.31
  4. Step 4: Simplify right side
    2,386.69x = 2,346,208.79
  5. Step 5: Solve for x
    x = 2,346,208.79/2,386.69
  6. Step 6: Final answer
    x = 983.04

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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.