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Finding the Fourth Proportional to 1,237.71, 1,856.58 and 313.27

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Solution

The fourth proportional to 1,237.71, 1,856.58 and 313.27 is: 469.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.71 : 1,856.58 = 313.27 : x
  2. Step 2: Convert to fraction form
    1,237.71/1,856.58 = 313.27/x
  3. Step 3: Cross multiply
    1,237.71x = 1,856.58 × 313.27
  4. Step 4: Simplify right side
    1,237.71x = 581,599.97
  5. Step 5: Solve for x
    x = 581,599.97/1,237.71
  6. Step 6: Final answer
    x = 469.90

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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.