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Finding the Fourth Proportional to 1,054.30, 1,580.55 and 745.18

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Solution

The fourth proportional to 1,054.30, 1,580.55 and 745.18 is: 1,117.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.30 : 1,580.55 = 745.18 : x
  2. Step 2: Convert to fraction form
    1,054.30/1,580.55 = 745.18/x
  3. Step 3: Cross multiply
    1,054.30x = 1,580.55 × 745.18
  4. Step 4: Simplify right side
    1,054.30x = 1,177,794.25
  5. Step 5: Solve for x
    x = 1,177,794.25/1,054.30
  6. Step 6: Final answer
    x = 1,117.13

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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.