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Finding the Fourth Proportional to 666,123.05, 997,445.40 and 437,700.47

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Solution

The fourth proportional to 666,123.05, 997,445.40 and 437,700.47 is: 655,407.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,123.05 : 997,445.40 = 437,700.47 : x
  2. Step 2: Convert to fraction form
    666,123.05/997,445.40 = 437,700.47/x
  3. Step 3: Cross multiply
    666,123.05x = 997,445.40 × 437,700.47
  4. Step 4: Simplify right side
    666,123.05x = 436,582,320,379.34
  5. Step 5: Solve for x
    x = 436,582,320,379.34/666,123.05
  6. Step 6: Final answer
    x = 655,407.92

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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.