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Finding the Fourth Proportional to 1,051.42, 1,577.22 and 434.92

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Solution

The fourth proportional to 1,051.42, 1,577.22 and 434.92 is: 652.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.42 : 1,577.22 = 434.92 : x
  2. Step 2: Convert to fraction form
    1,051.42/1,577.22 = 434.92/x
  3. Step 3: Cross multiply
    1,051.42x = 1,577.22 × 434.92
  4. Step 4: Simplify right side
    1,051.42x = 685,964.52
  5. Step 5: Solve for x
    x = 685,964.52/1,051.42
  6. Step 6: Final answer
    x = 652.42

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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.