Home / 1,405.44-1,938.60-1,357.92

Finding the Fourth Proportional to 1,405.44, 1,938.60 and 1,357.92

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Solution

The fourth proportional to 1,405.44, 1,938.60 and 1,357.92 is: 1,873.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.44 : 1,938.60 = 1,357.92 : x
  2. Step 2: Convert to fraction form
    1,405.44/1,938.60 = 1,357.92/x
  3. Step 3: Cross multiply
    1,405.44x = 1,938.60 × 1,357.92
  4. Step 4: Simplify right side
    1,405.44x = 2,632,463.71
  5. Step 5: Solve for x
    x = 2,632,463.71/1,405.44
  6. Step 6: Final answer
    x = 1,873.05

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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.