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Finding the Fourth Proportional to 1,237.99, 1,856.93 and 313.58

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Solution

The fourth proportional to 1,237.99, 1,856.93 and 313.58 is: 470.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.99 : 1,856.93 = 313.58 : x
  2. Step 2: Convert to fraction form
    1,237.99/1,856.93 = 313.58/x
  3. Step 3: Cross multiply
    1,237.99x = 1,856.93 × 313.58
  4. Step 4: Simplify right side
    1,237.99x = 582,292.64
  5. Step 5: Solve for x
    x = 582,292.64/1,237.99
  6. Step 6: Final answer
    x = 470.35

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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.