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Finding the Fourth Proportional to 666,864.23, 998,148.47 and 439,347.70

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Solution

The fourth proportional to 666,864.23, 998,148.47 and 439,347.70 is: 657,606.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,864.23 : 998,148.47 = 439,347.70 : x
  2. Step 2: Convert to fraction form
    666,864.23/998,148.47 = 439,347.70/x
  3. Step 3: Cross multiply
    666,864.23x = 998,148.47 × 439,347.70
  4. Step 4: Simplify right side
    666,864.23x = 438,534,232,895.42
  5. Step 5: Solve for x
    x = 438,534,232,895.42/666,864.23
  6. Step 6: Final answer
    x = 657,606.47

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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.