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Finding the Fourth Proportional to 1,513.64, 2,270.92 and 783.74

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Solution

The fourth proportional to 1,513.64, 2,270.92 and 783.74 is: 1,175.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.64 : 2,270.92 = 783.74 : x
  2. Step 2: Convert to fraction form
    1,513.64/2,270.92 = 783.74/x
  3. Step 3: Cross multiply
    1,513.64x = 2,270.92 × 783.74
  4. Step 4: Simplify right side
    1,513.64x = 1,779,810.84
  5. Step 5: Solve for x
    x = 1,779,810.84/1,513.64
  6. Step 6: Final answer
    x = 1,175.85

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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.