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Finding the Fourth Proportional to 1,628, 2,246.99 and 1,038.40

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Solution

The fourth proportional to 1,628, 2,246.99 and 1,038.40 is: 1,433.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628 : 2,246.99 = 1,038.40 : x
  2. Step 2: Convert to fraction form
    1,628/2,246.99 = 1,038.40/x
  3. Step 3: Cross multiply
    1,628x = 2,246.99 × 1,038.40
  4. Step 4: Simplify right side
    1,628x = 2,333,274.42
  5. Step 5: Solve for x
    x = 2,333,274.42/1,628
  6. Step 6: Final answer
    x = 1,433.22

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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.