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Finding the Fourth Proportional to 889.99, 1,333.16 and 715.72

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Solution

The fourth proportional to 889.99, 1,333.16 and 715.72 is: 1,072.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.99 : 1,333.16 = 715.72 : x
  2. Step 2: Convert to fraction form
    889.99/1,333.16 = 715.72/x
  3. Step 3: Cross multiply
    889.99x = 1,333.16 × 715.72
  4. Step 4: Simplify right side
    889.99x = 954,169.28
  5. Step 5: Solve for x
    x = 954,169.28/889.99
  6. Step 6: Final answer
    x = 1,072.11

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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.