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Finding the Fourth Proportional to 354,407.79, 489,095.01 and 201,452.40

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Solution

The fourth proportional to 354,407.79, 489,095.01 and 201,452.40 is: 278,011.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,407.79 : 489,095.01 = 201,452.40 : x
  2. Step 2: Convert to fraction form
    354,407.79/489,095.01 = 201,452.40/x
  3. Step 3: Cross multiply
    354,407.79x = 489,095.01 × 201,452.40
  4. Step 4: Simplify right side
    354,407.79x = 98,529,363,592.52
  5. Step 5: Solve for x
    x = 98,529,363,592.52/354,407.79
  6. Step 6: Final answer
    x = 278,011.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.