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Finding the Fourth Proportional to 545,905.70, 818,858.55 and 521,411.30

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Solution

The fourth proportional to 545,905.70, 818,858.55 and 521,411.30 is: 782,116.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,905.70 : 818,858.55 = 521,411.30 : x
  2. Step 2: Convert to fraction form
    545,905.70/818,858.55 = 521,411.30/x
  3. Step 3: Cross multiply
    545,905.70x = 818,858.55 × 521,411.30
  4. Step 4: Simplify right side
    545,905.70x = 426,962,101,071.62
  5. Step 5: Solve for x
    x = 426,962,101,071.62/545,905.70
  6. Step 6: Final answer
    x = 782,116.95

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1.5x scale

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.