Home / 825,430.40-1,238,145.60-405,526.40

Finding the Fourth Proportional to 825,430.40, 1,238,145.60 and 405,526.40

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Solution

The fourth proportional to 825,430.40, 1,238,145.60 and 405,526.40 is: 608,289.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,430.40 : 1,238,145.60 = 405,526.40 : x
  2. Step 2: Convert to fraction form
    825,430.40/1,238,145.60 = 405,526.40/x
  3. Step 3: Cross multiply
    825,430.40x = 1,238,145.60 × 405,526.40
  4. Step 4: Simplify right side
    825,430.40x = 502,100,727,843.84
  5. Step 5: Solve for x
    x = 502,100,727,843.84/825,430.40
  6. Step 6: Final answer
    x = 608,289.60

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Double scale
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Similar ratio
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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.