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Finding the Fourth Proportional to 1,239.70, 1,859.56 and 373.96

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Solution

The fourth proportional to 1,239.70, 1,859.56 and 373.96 is: 560.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.70 : 1,859.56 = 373.96 : x
  2. Step 2: Convert to fraction form
    1,239.70/1,859.56 = 373.96/x
  3. Step 3: Cross multiply
    1,239.70x = 1,859.56 × 373.96
  4. Step 4: Simplify right side
    1,239.70x = 695,401.06
  5. Step 5: Solve for x
    x = 695,401.06/1,239.70
  6. Step 6: Final answer
    x = 560.94

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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.