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Finding the Fourth Proportional to 984.84, 1,358.35 and 670.01

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Solution

The fourth proportional to 984.84, 1,358.35 and 670.01 is: 924.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.84 : 1,358.35 = 670.01 : x
  2. Step 2: Convert to fraction form
    984.84/1,358.35 = 670.01/x
  3. Step 3: Cross multiply
    984.84x = 1,358.35 × 670.01
  4. Step 4: Simplify right side
    984.84x = 910,099.62
  5. Step 5: Solve for x
    x = 910,099.62/984.84
  6. Step 6: Final answer
    x = 924.11

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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.