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Finding the Fourth Proportional to 756.02, 1,133.16 and 390.02

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Solution

The fourth proportional to 756.02, 1,133.16 and 390.02 is: 584.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.02 : 1,133.16 = 390.02 : x
  2. Step 2: Convert to fraction form
    756.02/1,133.16 = 390.02/x
  3. Step 3: Cross multiply
    756.02x = 1,133.16 × 390.02
  4. Step 4: Simplify right side
    756.02x = 441,955.06
  5. Step 5: Solve for x
    x = 441,955.06/756.02
  6. Step 6: Final answer
    x = 584.58

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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.