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Finding the Fourth Proportional to 1,804.32, 2,492 and 1,217.28

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Solution

The fourth proportional to 1,804.32, 2,492 and 1,217.28 is: 1,681.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.32 : 2,492 = 1,217.28 : x
  2. Step 2: Convert to fraction form
    1,804.32/2,492 = 1,217.28/x
  3. Step 3: Cross multiply
    1,804.32x = 2,492 × 1,217.28
  4. Step 4: Simplify right side
    1,804.32x = 3,033,461.76
  5. Step 5: Solve for x
    x = 3,033,461.76/1,804.32
  6. Step 6: Final answer
    x = 1,681.22

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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.