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Finding the Fourth Proportional to 356,518.40, 534,777.60 and 256,985.60

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Solution

The fourth proportional to 356,518.40, 534,777.60 and 256,985.60 is: 385,478.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,518.40 : 534,777.60 = 256,985.60 : x
  2. Step 2: Convert to fraction form
    356,518.40/534,777.60 = 256,985.60/x
  3. Step 3: Cross multiply
    356,518.40x = 534,777.60 × 256,985.60
  4. Step 4: Simplify right side
    356,518.40x = 137,430,142,402.56
  5. Step 5: Solve for x
    x = 137,430,142,402.56/356,518.40
  6. Step 6: Final answer
    x = 385,478.40

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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.