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Finding the Fourth Proportional to 1,376.53, 1,898.84 and 904.50

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Solution

The fourth proportional to 1,376.53, 1,898.84 and 904.50 is: 1,247.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.53 : 1,898.84 = 904.50 : x
  2. Step 2: Convert to fraction form
    1,376.53/1,898.84 = 904.50/x
  3. Step 3: Cross multiply
    1,376.53x = 1,898.84 × 904.50
  4. Step 4: Simplify right side
    1,376.53x = 1,717,503.04
  5. Step 5: Solve for x
    x = 1,717,503.04/1,376.53
  6. Step 6: Final answer
    x = 1,247.71

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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.