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Finding the Fourth Proportional to 1,886, 2,602.38 and 1,223.76

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Solution

The fourth proportional to 1,886, 2,602.38 and 1,223.76 is: 1,688.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886 : 2,602.38 = 1,223.76 : x
  2. Step 2: Convert to fraction form
    1,886/2,602.38 = 1,223.76/x
  3. Step 3: Cross multiply
    1,886x = 2,602.38 × 1,223.76
  4. Step 4: Simplify right side
    1,886x = 3,184,688.55
  5. Step 5: Solve for x
    x = 3,184,688.55/1,886
  6. Step 6: Final answer
    x = 1,688.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.