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Finding the Fourth Proportional to 668.84, 1,001.90 and 612.84

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Solution

The fourth proportional to 668.84, 1,001.90 and 612.84 is: 918.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.84 : 1,001.90 = 612.84 : x
  2. Step 2: Convert to fraction form
    668.84/1,001.90 = 612.84/x
  3. Step 3: Cross multiply
    668.84x = 1,001.90 × 612.84
  4. Step 4: Simplify right side
    668.84x = 614,004.40
  5. Step 5: Solve for x
    x = 614,004.40/668.84
  6. Step 6: Final answer
    x = 918.01

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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.