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Finding the Fourth Proportional to 751.36, 1,124.82 and 425.74

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Solution

The fourth proportional to 751.36, 1,124.82 and 425.74 is: 637.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.36 : 1,124.82 = 425.74 : x
  2. Step 2: Convert to fraction form
    751.36/1,124.82 = 425.74/x
  3. Step 3: Cross multiply
    751.36x = 1,124.82 × 425.74
  4. Step 4: Simplify right side
    751.36x = 478,880.87
  5. Step 5: Solve for x
    x = 478,880.87/751.36
  6. Step 6: Final answer
    x = 637.35

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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.