Home / 1,051.12-1,450.51-631.72

Finding the Fourth Proportional to 1,051.12, 1,450.51 and 631.72

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Solution

The fourth proportional to 1,051.12, 1,450.51 and 631.72 is: 871.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.12 : 1,450.51 = 631.72 : x
  2. Step 2: Convert to fraction form
    1,051.12/1,450.51 = 631.72/x
  3. Step 3: Cross multiply
    1,051.12x = 1,450.51 × 631.72
  4. Step 4: Simplify right side
    1,051.12x = 916,316.18
  5. Step 5: Solve for x
    x = 916,316.18/1,051.12
  6. Step 6: Final answer
    x = 871.75

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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.