Home / 812,975.51-1,121,905.40-450,421.94

Finding the Fourth Proportional to 812,975.51, 1,121,905.40 and 450,421.94

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Solution

The fourth proportional to 812,975.51, 1,121,905.40 and 450,421.94 is: 621,581.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,975.51 : 1,121,905.40 = 450,421.94 : x
  2. Step 2: Convert to fraction form
    812,975.51/1,121,905.40 = 450,421.94/x
  3. Step 3: Cross multiply
    812,975.51x = 1,121,905.40 × 450,421.94
  4. Step 4: Simplify right side
    812,975.51x = 505,330,798,902.84
  5. Step 5: Solve for x
    x = 505,330,798,902.84/812,975.51
  6. Step 6: Final answer
    x = 621,581.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.