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Finding the Fourth Proportional to 383,030.61, 528,639.71 and 290,998.45

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Solution

The fourth proportional to 383,030.61, 528,639.71 and 290,998.45 is: 401,621.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,030.61 : 528,639.71 = 290,998.45 : x
  2. Step 2: Convert to fraction form
    383,030.61/528,639.71 = 290,998.45/x
  3. Step 3: Cross multiply
    383,030.61x = 528,639.71 × 290,998.45
  4. Step 4: Simplify right side
    383,030.61x = 153,833,337,540.05
  5. Step 5: Solve for x
    x = 153,833,337,540.05/383,030.61
  6. Step 6: Final answer
    x = 401,621.52

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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.