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Finding the Fourth Proportional to 1,368.59, 2,051.51 and 783.39

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Solution

The fourth proportional to 1,368.59, 2,051.51 and 783.39 is: 1,174.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.59 : 2,051.51 = 783.39 : x
  2. Step 2: Convert to fraction form
    1,368.59/2,051.51 = 783.39/x
  3. Step 3: Cross multiply
    1,368.59x = 2,051.51 × 783.39
  4. Step 4: Simplify right side
    1,368.59x = 1,607,128.50
  5. Step 5: Solve for x
    x = 1,607,128.50/1,368.59
  6. Step 6: Final answer
    x = 1,174.29

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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.