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Finding the Fourth Proportional to 1,673.76, 2,515.19 and 894.31

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Solution

The fourth proportional to 1,673.76, 2,515.19 and 894.31 is: 1,343.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,673.76 : 2,515.19 = 894.31 : x
  2. Step 2: Convert to fraction form
    1,673.76/2,515.19 = 894.31/x
  3. Step 3: Cross multiply
    1,673.76x = 2,515.19 × 894.31
  4. Step 4: Simplify right side
    1,673.76x = 2,249,348.81
  5. Step 5: Solve for x
    x = 2,249,348.81/1,673.76
  6. Step 6: Final answer
    x = 1,343.89

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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.