Home / 1,421.01-2,117.75-1,347.20

Finding the Fourth Proportional to 1,421.01, 2,117.75 and 1,347.20

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Solution

The fourth proportional to 1,421.01, 2,117.75 and 1,347.20 is: 2,007.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.01 : 2,117.75 = 1,347.20 : x
  2. Step 2: Convert to fraction form
    1,421.01/2,117.75 = 1,347.20/x
  3. Step 3: Cross multiply
    1,421.01x = 2,117.75 × 1,347.20
  4. Step 4: Simplify right side
    1,421.01x = 2,853,032.80
  5. Step 5: Solve for x
    x = 2,853,032.80/1,421.01
  6. Step 6: Final answer
    x = 2,007.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.