Home / 1,488.21-2,053.80-928.68

Finding the Fourth Proportional to 1,488.21, 2,053.80 and 928.68

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Solution

The fourth proportional to 1,488.21, 2,053.80 and 928.68 is: 1,281.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.21 : 2,053.80 = 928.68 : x
  2. Step 2: Convert to fraction form
    1,488.21/2,053.80 = 928.68/x
  3. Step 3: Cross multiply
    1,488.21x = 2,053.80 × 928.68
  4. Step 4: Simplify right side
    1,488.21x = 1,907,322.98
  5. Step 5: Solve for x
    x = 1,907,322.98/1,488.21
  6. Step 6: Final answer
    x = 1,281.62

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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.