Home / 1,417.40-2,127.84-1,111.20

Finding the Fourth Proportional to 1,417.40, 2,127.84 and 1,111.20

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Solution

The fourth proportional to 1,417.40, 2,127.84 and 1,111.20 is: 1,668.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.40 : 2,127.84 = 1,111.20 : x
  2. Step 2: Convert to fraction form
    1,417.40/2,127.84 = 1,111.20/x
  3. Step 3: Cross multiply
    1,417.40x = 2,127.84 × 1,111.20
  4. Step 4: Simplify right side
    1,417.40x = 2,364,455.81
  5. Step 5: Solve for x
    x = 2,364,455.81/1,417.40
  6. Step 6: Final answer
    x = 1,668.16

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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.