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Finding the Fourth Proportional to 753.99, 1,130.78 and 425.00

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Solution

The fourth proportional to 753.99, 1,130.78 and 425.00 is: 637.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.99 : 1,130.78 = 425.00 : x
  2. Step 2: Convert to fraction form
    753.99/1,130.78 = 425.00/x
  3. Step 3: Cross multiply
    753.99x = 1,130.78 × 425.00
  4. Step 4: Simplify right side
    753.99x = 480,573.72
  5. Step 5: Solve for x
    x = 480,573.72/753.99
  6. Step 6: Final answer
    x = 637.37

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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.