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Finding the Fourth Proportional to 919,686.56, 1,379,737.44 and 280,047.50

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Solution

The fourth proportional to 919,686.56, 1,379,737.44 and 280,047.50 is: 420,134.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,686.56 : 1,379,737.44 = 280,047.50 : x
  2. Step 2: Convert to fraction form
    919,686.56/1,379,737.44 = 280,047.50/x
  3. Step 3: Cross multiply
    919,686.56x = 1,379,737.44 × 280,047.50
  4. Step 4: Simplify right side
    919,686.56x = 386,392,013,829.71
  5. Step 5: Solve for x
    x = 386,392,013,829.71/919,686.56
  6. Step 6: Final answer
    x = 420,134.46

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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.