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Finding the Fourth Proportional to 257,877.80, 386,816.70 and 163,399.40

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Solution

The fourth proportional to 257,877.80, 386,816.70 and 163,399.40 is: 245,099.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,877.80 : 386,816.70 = 163,399.40 : x
  2. Step 2: Convert to fraction form
    257,877.80/386,816.70 = 163,399.40/x
  3. Step 3: Cross multiply
    257,877.80x = 386,816.70 × 163,399.40
  4. Step 4: Simplify right side
    257,877.80x = 63,205,616,689.98
  5. Step 5: Solve for x
    x = 63,205,616,689.98/257,877.80
  6. Step 6: Final answer
    x = 245,099.10

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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.