Home / 656,419.12-905,669.43-427,313.59

Finding the Fourth Proportional to 656,419.12, 905,669.43 and 427,313.59

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Solution

The fourth proportional to 656,419.12, 905,669.43 and 427,313.59 is: 589,569.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,419.12 : 905,669.43 = 427,313.59 : x
  2. Step 2: Convert to fraction form
    656,419.12/905,669.43 = 427,313.59/x
  3. Step 3: Cross multiply
    656,419.12x = 905,669.43 × 427,313.59
  4. Step 4: Simplify right side
    656,419.12x = 387,004,855,486.55
  5. Step 5: Solve for x
    x = 387,004,855,486.55/656,419.12
  6. Step 6: Final answer
    x = 589,569.75

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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.