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Finding the Fourth Proportional to 405,101.20, 607,651.80 and 399,196.30

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Solution

The fourth proportional to 405,101.20, 607,651.80 and 399,196.30 is: 598,794.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,101.20 : 607,651.80 = 399,196.30 : x
  2. Step 2: Convert to fraction form
    405,101.20/607,651.80 = 399,196.30/x
  3. Step 3: Cross multiply
    405,101.20x = 607,651.80 × 399,196.30
  4. Step 4: Simplify right side
    405,101.20x = 242,572,350,248.34
  5. Step 5: Solve for x
    x = 242,572,350,248.34/405,101.20
  6. Step 6: Final answer
    x = 598,794.45

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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.