Home / 1,405.47-2,090.34-1,377.84

Finding the Fourth Proportional to 1,405.47, 2,090.34 and 1,377.84

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Solution

The fourth proportional to 1,405.47, 2,090.34 and 1,377.84 is: 2,049.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.47 : 2,090.34 = 1,377.84 : x
  2. Step 2: Convert to fraction form
    1,405.47/2,090.34 = 1,377.84/x
  3. Step 3: Cross multiply
    1,405.47x = 2,090.34 × 1,377.84
  4. Step 4: Simplify right side
    1,405.47x = 2,880,154.07
  5. Step 5: Solve for x
    x = 2,880,154.07/1,405.47
  6. Step 6: Final answer
    x = 2,049.25

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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.