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Finding the Fourth Proportional to 621,689.84, 932,534.70 and 411,278.54

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Solution

The fourth proportional to 621,689.84, 932,534.70 and 411,278.54 is: 616,917.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,689.84 : 932,534.70 = 411,278.54 : x
  2. Step 2: Convert to fraction form
    621,689.84/932,534.70 = 411,278.54/x
  3. Step 3: Cross multiply
    621,689.84x = 932,534.70 × 411,278.54
  4. Step 4: Simplify right side
    621,689.84x = 383,531,509,915.34
  5. Step 5: Solve for x
    x = 383,531,509,915.34/621,689.84
  6. Step 6: Final answer
    x = 616,917.77

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Double scale
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Similar ratio
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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.