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Finding the Fourth Proportional to 790.30, 1,185.51 and 303.35

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Solution

The fourth proportional to 790.30, 1,185.51 and 303.35 is: 455.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.30 : 1,185.51 = 303.35 : x
  2. Step 2: Convert to fraction form
    790.30/1,185.51 = 303.35/x
  3. Step 3: Cross multiply
    790.30x = 1,185.51 × 303.35
  4. Step 4: Simplify right side
    790.30x = 359,624.46
  5. Step 5: Solve for x
    x = 359,624.46/790.30
  6. Step 6: Final answer
    x = 455.05

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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.