Home / 1,003.90-1,386.26-631.50

Finding the Fourth Proportional to 1,003.90, 1,386.26 and 631.50

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Solution

The fourth proportional to 1,003.90, 1,386.26 and 631.50 is: 872.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.90 : 1,386.26 = 631.50 : x
  2. Step 2: Convert to fraction form
    1,003.90/1,386.26 = 631.50/x
  3. Step 3: Cross multiply
    1,003.90x = 1,386.26 × 631.50
  4. Step 4: Simplify right side
    1,003.90x = 875,424.77
  5. Step 5: Solve for x
    x = 875,424.77/1,003.90
  6. Step 6: Final answer
    x = 872.03

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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.