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Finding the Fourth Proportional to 383,279.50, 528,642.36 and 281,270.50

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Solution

The fourth proportional to 383,279.50, 528,642.36 and 281,270.50 is: 387,945.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,279.50 : 528,642.36 = 281,270.50 : x
  2. Step 2: Convert to fraction form
    383,279.50/528,642.36 = 281,270.50/x
  3. Step 3: Cross multiply
    383,279.50x = 528,642.36 × 281,270.50
  4. Step 4: Simplify right side
    383,279.50x = 148,691,500,918.38
  5. Step 5: Solve for x
    x = 148,691,500,918.38/383,279.50
  6. Step 6: Final answer
    x = 387,945.35

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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.