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Finding the Fourth Proportional to 745.04, 1,025.60 and 667.89

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Solution

The fourth proportional to 745.04, 1,025.60 and 667.89 is: 919.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.04 : 1,025.60 = 667.89 : x
  2. Step 2: Convert to fraction form
    745.04/1,025.60 = 667.89/x
  3. Step 3: Cross multiply
    745.04x = 1,025.60 × 667.89
  4. Step 4: Simplify right side
    745.04x = 684,984.64
  5. Step 5: Solve for x
    x = 684,984.64/745.04
  6. Step 6: Final answer
    x = 919.39

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1.5x scale

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.