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Finding the Fourth Proportional to 745.99, 1,029.39 and 431.19

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Solution

The fourth proportional to 745.99, 1,029.39 and 431.19 is: 595.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.99 : 1,029.39 = 431.19 : x
  2. Step 2: Convert to fraction form
    745.99/1,029.39 = 431.19/x
  3. Step 3: Cross multiply
    745.99x = 1,029.39 × 431.19
  4. Step 4: Simplify right side
    745.99x = 443,861.06
  5. Step 5: Solve for x
    x = 443,861.06/745.99
  6. Step 6: Final answer
    x = 595.00

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Double scale
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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.