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Finding the Fourth Proportional to 530,392.67, 731,957.40 and 288,690.89

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Solution

The fourth proportional to 530,392.67, 731,957.40 and 288,690.89 is: 398,401.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,392.67 : 731,957.40 = 288,690.89 : x
  2. Step 2: Convert to fraction form
    530,392.67/731,957.40 = 288,690.89/x
  3. Step 3: Cross multiply
    530,392.67x = 731,957.40 × 288,690.89
  4. Step 4: Simplify right side
    530,392.67x = 211,309,433,248.09
  5. Step 5: Solve for x
    x = 211,309,433,248.09/530,392.67
  6. Step 6: Final answer
    x = 398,401.87

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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.