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Finding the Fourth Proportional to 436,666.60, 654,999.90 and 121,126.60

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Solution

The fourth proportional to 436,666.60, 654,999.90 and 121,126.60 is: 181,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,666.60 : 654,999.90 = 121,126.60 : x
  2. Step 2: Convert to fraction form
    436,666.60/654,999.90 = 121,126.60/x
  3. Step 3: Cross multiply
    436,666.60x = 654,999.90 × 121,126.60
  4. Step 4: Simplify right side
    436,666.60x = 79,337,910,887.34
  5. Step 5: Solve for x
    x = 79,337,910,887.34/436,666.60
  6. Step 6: Final answer
    x = 181,689.90

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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.