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Finding the Fourth Proportional to 611,821.53, 917,863.65 and 256,630.86

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Solution

The fourth proportional to 611,821.53, 917,863.65 and 256,630.86 is: 385,001.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,821.53 : 917,863.65 = 256,630.86 : x
  2. Step 2: Convert to fraction form
    611,821.53/917,863.65 = 256,630.86/x
  3. Step 3: Cross multiply
    611,821.53x = 917,863.65 × 256,630.86
  4. Step 4: Simplify right side
    611,821.53x = 235,552,137,862.24
  5. Step 5: Solve for x
    x = 235,552,137,862.24/611,821.53
  6. Step 6: Final answer
    x = 385,001.39

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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.