Home / 1,421.55-1,968.30-1,348.65

Finding the Fourth Proportional to 1,421.55, 1,968.30 and 1,348.65

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Solution

The fourth proportional to 1,421.55, 1,968.30 and 1,348.65 is: 1,867.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.55 : 1,968.30 = 1,348.65 : x
  2. Step 2: Convert to fraction form
    1,421.55/1,968.30 = 1,348.65/x
  3. Step 3: Cross multiply
    1,421.55x = 1,968.30 × 1,348.65
  4. Step 4: Simplify right side
    1,421.55x = 2,654,547.80
  5. Step 5: Solve for x
    x = 2,654,547.80/1,421.55
  6. Step 6: Final answer
    x = 1,867.36

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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.