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Finding the Fourth Proportional to 545,121.20, 816,904.20 and 401,848.40

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Solution

The fourth proportional to 545,121.20, 816,904.20 and 401,848.40 is: 602,199.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,121.20 : 816,904.20 = 401,848.40 : x
  2. Step 2: Convert to fraction form
    545,121.20/816,904.20 = 401,848.40/x
  3. Step 3: Cross multiply
    545,121.20x = 816,904.20 × 401,848.40
  4. Step 4: Simplify right side
    545,121.20x = 328,271,645,723.28
  5. Step 5: Solve for x
    x = 328,271,645,723.28/545,121.20
  6. Step 6: Final answer
    x = 602,199.37

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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.