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Finding the Fourth Proportional to 405,341.28, 605,043.63 and 357,459.30

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Solution

The fourth proportional to 405,341.28, 605,043.63 and 357,459.30 is: 533,571.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,341.28 : 605,043.63 = 357,459.30 : x
  2. Step 2: Convert to fraction form
    405,341.28/605,043.63 = 357,459.30/x
  3. Step 3: Cross multiply
    405,341.28x = 605,043.63 × 357,459.30
  4. Step 4: Simplify right side
    405,341.28x = 216,278,472,449.26
  5. Step 5: Solve for x
    x = 216,278,472,449.26/405,341.28
  6. Step 6: Final answer
    x = 533,571.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.