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Finding the Fourth Proportional to 621,687.84, 932,531.70 and 411,276.54

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Solution

The fourth proportional to 621,687.84, 932,531.70 and 411,276.54 is: 616,914.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,687.84 : 932,531.70 = 411,276.54 : x
  2. Step 2: Convert to fraction form
    621,687.84/932,531.70 = 411,276.54/x
  3. Step 3: Cross multiply
    621,687.84x = 932,531.70 × 411,276.54
  4. Step 4: Simplify right side
    621,687.84x = 383,528,411,016.32
  5. Step 5: Solve for x
    x = 383,528,411,016.32/621,687.84
  6. Step 6: Final answer
    x = 616,914.77

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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.