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Finding the Fourth Proportional to 1,051.20, 1,576.86 and 434.88

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Solution

The fourth proportional to 1,051.20, 1,576.86 and 434.88 is: 652.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.20 : 1,576.86 = 434.88 : x
  2. Step 2: Convert to fraction form
    1,051.20/1,576.86 = 434.88/x
  3. Step 3: Cross multiply
    1,051.20x = 1,576.86 × 434.88
  4. Step 4: Simplify right side
    1,051.20x = 685,744.88
  5. Step 5: Solve for x
    x = 685,744.88/1,051.20
  6. Step 6: Final answer
    x = 652.34

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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.