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Finding the Fourth Proportional to 403,358.80, 605,038.20 and 308,880.40

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Solution

The fourth proportional to 403,358.80, 605,038.20 and 308,880.40 is: 463,320.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,358.80 : 605,038.20 = 308,880.40 : x
  2. Step 2: Convert to fraction form
    403,358.80/605,038.20 = 308,880.40/x
  3. Step 3: Cross multiply
    403,358.80x = 605,038.20 × 308,880.40
  4. Step 4: Simplify right side
    403,358.80x = 186,884,441,231.28
  5. Step 5: Solve for x
    x = 186,884,441,231.28/403,358.80
  6. Step 6: Final answer
    x = 463,320.60

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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.