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Finding the Fourth Proportional to 1,030.81, 1,546.32 and 290.47

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Solution

The fourth proportional to 1,030.81, 1,546.32 and 290.47 is: 435.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.81 : 1,546.32 = 290.47 : x
  2. Step 2: Convert to fraction form
    1,030.81/1,546.32 = 290.47/x
  3. Step 3: Cross multiply
    1,030.81x = 1,546.32 × 290.47
  4. Step 4: Simplify right side
    1,030.81x = 449,159.57
  5. Step 5: Solve for x
    x = 449,159.57/1,030.81
  6. Step 6: Final answer
    x = 435.73

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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.