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Finding the Fourth Proportional to 1,239.90, 1,859.58 and 373.74

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Solution

The fourth proportional to 1,239.90, 1,859.58 and 373.74 is: 560.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.90 : 1,859.58 = 373.74 : x
  2. Step 2: Convert to fraction form
    1,239.90/1,859.58 = 373.74/x
  3. Step 3: Cross multiply
    1,239.90x = 1,859.58 × 373.74
  4. Step 4: Simplify right side
    1,239.90x = 694,999.43
  5. Step 5: Solve for x
    x = 694,999.43/1,239.90
  6. Step 6: Final answer
    x = 560.53

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.