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Finding the Fourth Proportional to 489,364.80, 734,047.20 and 347,647.20

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Solution

The fourth proportional to 489,364.80, 734,047.20 and 347,647.20 is: 521,470.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,364.80 : 734,047.20 = 347,647.20 : x
  2. Step 2: Convert to fraction form
    489,364.80/734,047.20 = 347,647.20/x
  3. Step 3: Cross multiply
    489,364.80x = 734,047.20 × 347,647.20
  4. Step 4: Simplify right side
    489,364.80x = 255,189,453,747.84
  5. Step 5: Solve for x
    x = 255,189,453,747.84/489,364.80
  6. Step 6: Final answer
    x = 521,470.80

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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.