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Finding the Fourth Proportional to 621,809.80, 931,548.30 and 579,819.40

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Solution

The fourth proportional to 621,809.80, 931,548.30 and 579,819.40 is: 868,641.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,809.80 : 931,548.30 = 579,819.40 : x
  2. Step 2: Convert to fraction form
    621,809.80/931,548.30 = 579,819.40/x
  3. Step 3: Cross multiply
    621,809.80x = 931,548.30 × 579,819.40
  4. Step 4: Simplify right side
    621,809.80x = 540,129,776,377.02
  5. Step 5: Solve for x
    x = 540,129,776,377.02/621,809.80
  6. Step 6: Final answer
    x = 868,641.47

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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.