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Finding the Fourth Proportional to 2,387.64, 3,582 and 1,929.54

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Solution

The fourth proportional to 2,387.64, 3,582 and 1,929.54 is: 2,894.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.64 : 3,582 = 1,929.54 : x
  2. Step 2: Convert to fraction form
    2,387.64/3,582 = 1,929.54/x
  3. Step 3: Cross multiply
    2,387.64x = 3,582 × 1,929.54
  4. Step 4: Simplify right side
    2,387.64x = 6,911,612.28
  5. Step 5: Solve for x
    x = 6,911,612.28/2,387.64
  6. Step 6: Final answer
    x = 2,894.75

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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.