Home / 1,030.41-1,421.26-636.75

Finding the Fourth Proportional to 1,030.41, 1,421.26 and 636.75

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Solution

The fourth proportional to 1,030.41, 1,421.26 and 636.75 is: 878.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.41 : 1,421.26 = 636.75 : x
  2. Step 2: Convert to fraction form
    1,030.41/1,421.26 = 636.75/x
  3. Step 3: Cross multiply
    1,030.41x = 1,421.26 × 636.75
  4. Step 4: Simplify right side
    1,030.41x = 904,987.31
  5. Step 5: Solve for x
    x = 904,987.31/1,030.41
  6. Step 6: Final answer
    x = 878.28

Related Problems

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Half scale
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Double scale
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1.5x scale

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.