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Finding the Fourth Proportional to 391,628.40, 586,276.20 and 233,775.60

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Solution

The fourth proportional to 391,628.40, 586,276.20 and 233,775.60 is: 349,967.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,628.40 : 586,276.20 = 233,775.60 : x
  2. Step 2: Convert to fraction form
    391,628.40/586,276.20 = 233,775.60/x
  3. Step 3: Cross multiply
    391,628.40x = 586,276.20 × 233,775.60
  4. Step 4: Simplify right side
    391,628.40x = 137,057,070,420.72
  5. Step 5: Solve for x
    x = 137,057,070,420.72/391,628.40
  6. Step 6: Final answer
    x = 349,967.14

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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.