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Finding the Fourth Proportional to 612,912, 919,679.04 and 280,571.52

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Solution

The fourth proportional to 612,912, 919,679.04 and 280,571.52 is: 420,999.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,912 : 919,679.04 = 280,571.52 : x
  2. Step 2: Convert to fraction form
    612,912/919,679.04 = 280,571.52/x
  3. Step 3: Cross multiply
    612,912x = 919,679.04 × 280,571.52
  4. Step 4: Simplify right side
    612,912x = 258,035,746,164.94
  5. Step 5: Solve for x
    x = 258,035,746,164.94/612,912
  6. Step 6: Final answer
    x = 420,999.66

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1.5x scale

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.