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Finding the Fourth Proportional to 1,798, 2,700.62 and 1,385.72

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Solution

The fourth proportional to 1,798, 2,700.62 and 1,385.72 is: 2,081.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,798 : 2,700.62 = 1,385.72 : x
  2. Step 2: Convert to fraction form
    1,798/2,700.62 = 1,385.72/x
  3. Step 3: Cross multiply
    1,798x = 2,700.62 × 1,385.72
  4. Step 4: Simplify right side
    1,798x = 3,742,303.15
  5. Step 5: Solve for x
    x = 3,742,303.15/1,798
  6. Step 6: Final answer
    x = 2,081.37

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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.