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Finding the Fourth Proportional to 1,875.72, 2,813.40 and 576.84

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Solution

The fourth proportional to 1,875.72, 2,813.40 and 576.84 is: 865.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.72 : 2,813.40 = 576.84 : x
  2. Step 2: Convert to fraction form
    1,875.72/2,813.40 = 576.84/x
  3. Step 3: Cross multiply
    1,875.72x = 2,813.40 × 576.84
  4. Step 4: Simplify right side
    1,875.72x = 1,622,881.66
  5. Step 5: Solve for x
    x = 1,622,881.66/1,875.72
  6. Step 6: Final answer
    x = 865.20

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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.