Home / 658,187.21-985,506.75-429,917.56

Finding the Fourth Proportional to 658,187.21, 985,506.75 and 429,917.56

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Solution

The fourth proportional to 658,187.21, 985,506.75 and 429,917.56 is: 643,717.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,187.21 : 985,506.75 = 429,917.56 : x
  2. Step 2: Convert to fraction form
    658,187.21/985,506.75 = 429,917.56/x
  3. Step 3: Cross multiply
    658,187.21x = 985,506.75 × 429,917.56
  4. Step 4: Simplify right side
    658,187.21x = 423,686,655,445.72
  5. Step 5: Solve for x
    x = 423,686,655,445.72/658,187.21
  6. Step 6: Final answer
    x = 643,717.54

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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.