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Finding the Fourth Proportional to 407,913.60, 612,089.10 and 171,280.20

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Solution

The fourth proportional to 407,913.60, 612,089.10 and 171,280.20 is: 257,012.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,913.60 : 612,089.10 = 171,280.20 : x
  2. Step 2: Convert to fraction form
    407,913.60/612,089.10 = 171,280.20/x
  3. Step 3: Cross multiply
    407,913.60x = 612,089.10 × 171,280.20
  4. Step 4: Simplify right side
    407,913.60x = 104,838,743,465.82
  5. Step 5: Solve for x
    x = 104,838,743,465.82/407,913.60
  6. Step 6: Final answer
    x = 257,012.13

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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.