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Finding the Fourth Proportional to 399,101.40, 598,652.10 and 391,228.20

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Solution

The fourth proportional to 399,101.40, 598,652.10 and 391,228.20 is: 586,842.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,101.40 : 598,652.10 = 391,228.20 : x
  2. Step 2: Convert to fraction form
    399,101.40/598,652.10 = 391,228.20/x
  3. Step 3: Cross multiply
    399,101.40x = 598,652.10 × 391,228.20
  4. Step 4: Simplify right side
    399,101.40x = 234,209,583,509.22
  5. Step 5: Solve for x
    x = 234,209,583,509.22/399,101.40
  6. Step 6: Final answer
    x = 586,842.30

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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.