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Finding the Fourth Proportional to 525,985.60, 788,978.40 and 171,011.20

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Solution

The fourth proportional to 525,985.60, 788,978.40 and 171,011.20 is: 256,516.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,985.60 : 788,978.40 = 171,011.20 : x
  2. Step 2: Convert to fraction form
    525,985.60/788,978.40 = 171,011.20/x
  3. Step 3: Cross multiply
    525,985.60x = 788,978.40 × 171,011.20
  4. Step 4: Simplify right side
    525,985.60x = 134,924,142,958.08
  5. Step 5: Solve for x
    x = 134,924,142,958.08/525,985.60
  6. Step 6: Final answer
    x = 256,516.80

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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.