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Finding the Fourth Proportional to 257,637.60, 386,456.40 and 173,656.80

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Solution

The fourth proportional to 257,637.60, 386,456.40 and 173,656.80 is: 260,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,637.60 : 386,456.40 = 173,656.80 : x
  2. Step 2: Convert to fraction form
    257,637.60/386,456.40 = 173,656.80/x
  3. Step 3: Cross multiply
    257,637.60x = 386,456.40 × 173,656.80
  4. Step 4: Simplify right side
    257,637.60x = 67,110,781,763.52
  5. Step 5: Solve for x
    x = 67,110,781,763.52/257,637.60
  6. Step 6: Final answer
    x = 260,485.20

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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.