Home / 1,030.16-1,421.89-636.95

Finding the Fourth Proportional to 1,030.16, 1,421.89 and 636.95

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Solution

The fourth proportional to 1,030.16, 1,421.89 and 636.95 is: 879.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.16 : 1,421.89 = 636.95 : x
  2. Step 2: Convert to fraction form
    1,030.16/1,421.89 = 636.95/x
  3. Step 3: Cross multiply
    1,030.16x = 1,421.89 × 636.95
  4. Step 4: Simplify right side
    1,030.16x = 905,674.80
  5. Step 5: Solve for x
    x = 905,674.80/1,030.16
  6. Step 6: Final answer
    x = 879.16

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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.