Home / 1,405.86-2,106.36-1,038.96

Finding the Fourth Proportional to 1,405.86, 2,106.36 and 1,038.96

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Solution

The fourth proportional to 1,405.86, 2,106.36 and 1,038.96 is: 1,556.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.86 : 2,106.36 = 1,038.96 : x
  2. Step 2: Convert to fraction form
    1,405.86/2,106.36 = 1,038.96/x
  3. Step 3: Cross multiply
    1,405.86x = 2,106.36 × 1,038.96
  4. Step 4: Simplify right side
    1,405.86x = 2,188,423.79
  5. Step 5: Solve for x
    x = 2,188,423.79/1,405.86
  6. Step 6: Final answer
    x = 1,556.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.