Home / 816,999.40-1,225,412.70-256,004.20

Finding the Fourth Proportional to 816,999.40, 1,225,412.70 and 256,004.20

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Solution

The fourth proportional to 816,999.40, 1,225,412.70 and 256,004.20 is: 383,979.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,999.40 : 1,225,412.70 = 256,004.20 : x
  2. Step 2: Convert to fraction form
    816,999.40/1,225,412.70 = 256,004.20/x
  3. Step 3: Cross multiply
    816,999.40x = 1,225,412.70 × 256,004.20
  4. Step 4: Simplify right side
    816,999.40x = 313,710,797,933.34
  5. Step 5: Solve for x
    x = 313,710,797,933.34/816,999.40
  6. Step 6: Final answer
    x = 383,979.23

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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.