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Finding the Fourth Proportional to 530,278.67, 731,783.21 and 288,561.17

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Solution

The fourth proportional to 530,278.67, 731,783.21 and 288,561.17 is: 398,213.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,278.67 : 731,783.21 = 288,561.17 : x
  2. Step 2: Convert to fraction form
    530,278.67/731,783.21 = 288,561.17/x
  3. Step 3: Cross multiply
    530,278.67x = 731,783.21 × 288,561.17
  4. Step 4: Simplify right side
    530,278.67x = 211,164,219,650.61
  5. Step 5: Solve for x
    x = 211,164,219,650.61/530,278.67
  6. Step 6: Final answer
    x = 398,213.68

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1.5x scale

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.