Home / 919,128.80-1,379,816.40-520,047.20

Finding the Fourth Proportional to 919,128.80, 1,379,816.40 and 520,047.20

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Solution

The fourth proportional to 919,128.80, 1,379,816.40 and 520,047.20 is: 780,706.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,128.80 : 1,379,816.40 = 520,047.20 : x
  2. Step 2: Convert to fraction form
    919,128.80/1,379,816.40 = 520,047.20/x
  3. Step 3: Cross multiply
    919,128.80x = 1,379,816.40 × 520,047.20
  4. Step 4: Simplify right side
    919,128.80x = 717,569,655,334.08
  5. Step 5: Solve for x
    x = 717,569,655,334.08/919,128.80
  6. Step 6: Final answer
    x = 780,706.31

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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.