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Finding the Fourth Proportional to 1,051.36, 1,450.10 and 771.50

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Solution

The fourth proportional to 1,051.36, 1,450.10 and 771.50 is: 1,064.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.36 : 1,450.10 = 771.50 : x
  2. Step 2: Convert to fraction form
    1,051.36/1,450.10 = 771.50/x
  3. Step 3: Cross multiply
    1,051.36x = 1,450.10 × 771.50
  4. Step 4: Simplify right side
    1,051.36x = 1,118,752.15
  5. Step 5: Solve for x
    x = 1,118,752.15/1,051.36
  6. Step 6: Final answer
    x = 1,064.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.