Home / 1,421.37-2,130.84-933.35

Finding the Fourth Proportional to 1,421.37, 2,130.84 and 933.35

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Solution

The fourth proportional to 1,421.37, 2,130.84 and 933.35 is: 1,399.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.37 : 2,130.84 = 933.35 : x
  2. Step 2: Convert to fraction form
    1,421.37/2,130.84 = 933.35/x
  3. Step 3: Cross multiply
    1,421.37x = 2,130.84 × 933.35
  4. Step 4: Simplify right side
    1,421.37x = 1,988,808.86
  5. Step 5: Solve for x
    x = 1,988,808.86/1,421.37
  6. Step 6: Final answer
    x = 1,399.22

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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.