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Finding the Fourth Proportional to 1,384.48, 2,076.09 and 654.25

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Solution

The fourth proportional to 1,384.48, 2,076.09 and 654.25 is: 981.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.48 : 2,076.09 = 654.25 : x
  2. Step 2: Convert to fraction form
    1,384.48/2,076.09 = 654.25/x
  3. Step 3: Cross multiply
    1,384.48x = 2,076.09 × 654.25
  4. Step 4: Simplify right side
    1,384.48x = 1,358,281.88
  5. Step 5: Solve for x
    x = 1,358,281.88/1,384.48
  6. Step 6: Final answer
    x = 981.08

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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.