Home / 438,558.79-605,221.07-257,401.37

Finding the Fourth Proportional to 438,558.79, 605,221.07 and 257,401.37

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Solution

The fourth proportional to 438,558.79, 605,221.07 and 257,401.37 is: 355,219.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,558.79 : 605,221.07 = 257,401.37 : x
  2. Step 2: Convert to fraction form
    438,558.79/605,221.07 = 257,401.37/x
  3. Step 3: Cross multiply
    438,558.79x = 605,221.07 × 257,401.37
  4. Step 4: Simplify right side
    438,558.79x = 155,784,732,570.87
  5. Step 5: Solve for x
    x = 155,784,732,570.87/438,558.79
  6. Step 6: Final answer
    x = 355,219.72

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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.