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Finding the Fourth Proportional to 750.50, 1,125.74 and 339.35

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Solution

The fourth proportional to 750.50, 1,125.74 and 339.35 is: 509.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.50 : 1,125.74 = 339.35 : x
  2. Step 2: Convert to fraction form
    750.50/1,125.74 = 339.35/x
  3. Step 3: Cross multiply
    750.50x = 1,125.74 × 339.35
  4. Step 4: Simplify right side
    750.50x = 382,015.36
  5. Step 5: Solve for x
    x = 382,015.36/750.50
  6. Step 6: Final answer
    x = 509.02

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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.