Home / 1,030.24-1,420.96-656.80

Finding the Fourth Proportional to 1,030.24, 1,420.96 and 656.80

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Solution

The fourth proportional to 1,030.24, 1,420.96 and 656.80 is: 905.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.24 : 1,420.96 = 656.80 : x
  2. Step 2: Convert to fraction form
    1,030.24/1,420.96 = 656.80/x
  3. Step 3: Cross multiply
    1,030.24x = 1,420.96 × 656.80
  4. Step 4: Simplify right side
    1,030.24x = 933,286.53
  5. Step 5: Solve for x
    x = 933,286.53/1,030.24
  6. Step 6: Final answer
    x = 905.89

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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.