Home / 1,407.90-2,111.64-433.80

Finding the Fourth Proportional to 1,407.90, 2,111.64 and 433.80

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Solution

The fourth proportional to 1,407.90, 2,111.64 and 433.80 is: 650.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.90 : 2,111.64 = 433.80 : x
  2. Step 2: Convert to fraction form
    1,407.90/2,111.64 = 433.80/x
  3. Step 3: Cross multiply
    1,407.90x = 2,111.64 × 433.80
  4. Step 4: Simplify right side
    1,407.90x = 916,029.43
  5. Step 5: Solve for x
    x = 916,029.43/1,407.90
  6. Step 6: Final answer
    x = 650.64

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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.