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Finding the Fourth Proportional to 889.98, 1,333.14 and 715.70

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Solution

The fourth proportional to 889.98, 1,333.14 and 715.70 is: 1,072.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.98 : 1,333.14 = 715.70 : x
  2. Step 2: Convert to fraction form
    889.98/1,333.14 = 715.70/x
  3. Step 3: Cross multiply
    889.98x = 1,333.14 × 715.70
  4. Step 4: Simplify right side
    889.98x = 954,128.95
  5. Step 5: Solve for x
    x = 954,128.95/889.98
  6. Step 6: Final answer
    x = 1,072.08

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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.