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Finding the Fourth Proportional to 750.51, 1,125.90 and 339.84

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Solution

The fourth proportional to 750.51, 1,125.90 and 339.84 is: 509.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.51 : 1,125.90 = 339.84 : x
  2. Step 2: Convert to fraction form
    750.51/1,125.90 = 339.84/x
  3. Step 3: Cross multiply
    750.51x = 1,125.90 × 339.84
  4. Step 4: Simplify right side
    750.51x = 382,625.86
  5. Step 5: Solve for x
    x = 382,625.86/750.51
  6. Step 6: Final answer
    x = 509.82

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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.