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Finding the Fourth Proportional to 1,372.49, 1,894.02 and 783.01

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Solution

The fourth proportional to 1,372.49, 1,894.02 and 783.01 is: 1,080.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.49 : 1,894.02 = 783.01 : x
  2. Step 2: Convert to fraction form
    1,372.49/1,894.02 = 783.01/x
  3. Step 3: Cross multiply
    1,372.49x = 1,894.02 × 783.01
  4. Step 4: Simplify right side
    1,372.49x = 1,483,036.03
  5. Step 5: Solve for x
    x = 1,483,036.03/1,372.49
  6. Step 6: Final answer
    x = 1,080.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.