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Finding the Fourth Proportional to 790.47, 1,185.57 and 303.27

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Solution

The fourth proportional to 790.47, 1,185.57 and 303.27 is: 454.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.47 : 1,185.57 = 303.27 : x
  2. Step 2: Convert to fraction form
    790.47/1,185.57 = 303.27/x
  3. Step 3: Cross multiply
    790.47x = 1,185.57 × 303.27
  4. Step 4: Simplify right side
    790.47x = 359,547.81
  5. Step 5: Solve for x
    x = 359,547.81/790.47
  6. Step 6: Final answer
    x = 454.85

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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.