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Finding the Fourth Proportional to 1,038.08, 1,556.34 and 627.12

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Solution

The fourth proportional to 1,038.08, 1,556.34 and 627.12 is: 940.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.08 : 1,556.34 = 627.12 : x
  2. Step 2: Convert to fraction form
    1,038.08/1,556.34 = 627.12/x
  3. Step 3: Cross multiply
    1,038.08x = 1,556.34 × 627.12
  4. Step 4: Simplify right side
    1,038.08x = 976,011.94
  5. Step 5: Solve for x
    x = 976,011.94/1,038.08
  6. Step 6: Final answer
    x = 940.21

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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.