Home / 919,064.80-1,378,640.40-287,999.20

Finding the Fourth Proportional to 919,064.80, 1,378,640.40 and 287,999.20

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Solution

The fourth proportional to 919,064.80, 1,378,640.40 and 287,999.20 is: 432,012.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,064.80 : 1,378,640.40 = 287,999.20 : x
  2. Step 2: Convert to fraction form
    919,064.80/1,378,640.40 = 287,999.20/x
  3. Step 3: Cross multiply
    919,064.80x = 1,378,640.40 × 287,999.20
  4. Step 4: Simplify right side
    919,064.80x = 397,047,332,287.68
  5. Step 5: Solve for x
    x = 397,047,332,287.68/919,064.80
  6. Step 6: Final answer
    x = 432,012.34

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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.