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Finding the Fourth Proportional to 319,311.60, 440,647.32 and 176,077.68

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Solution

The fourth proportional to 319,311.60, 440,647.32 and 176,077.68 is: 242,985.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,311.60 : 440,647.32 = 176,077.68 : x
  2. Step 2: Convert to fraction form
    319,311.60/440,647.32 = 176,077.68/x
  3. Step 3: Cross multiply
    319,311.60x = 440,647.32 × 176,077.68
  4. Step 4: Simplify right side
    319,311.60x = 77,588,157,803.82
  5. Step 5: Solve for x
    x = 77,588,157,803.82/319,311.60
  6. Step 6: Final answer
    x = 242,985.72

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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.