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Finding the Fourth Proportional to 1,368.78, 2,053.18 and 503.09

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Solution

The fourth proportional to 1,368.78, 2,053.18 and 503.09 is: 754.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.78 : 2,053.18 = 503.09 : x
  2. Step 2: Convert to fraction form
    1,368.78/2,053.18 = 503.09/x
  3. Step 3: Cross multiply
    1,368.78x = 2,053.18 × 503.09
  4. Step 4: Simplify right side
    1,368.78x = 1,032,943.94
  5. Step 5: Solve for x
    x = 1,032,943.94/1,368.78
  6. Step 6: Final answer
    x = 754.64

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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.