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Finding the Fourth Proportional to 626,995.62, 865,009.80 and 355,000.86

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Solution

The fourth proportional to 626,995.62, 865,009.80 and 355,000.86 is: 489,762.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,995.62 : 865,009.80 = 355,000.86 : x
  2. Step 2: Convert to fraction form
    626,995.62/865,009.80 = 355,000.86/x
  3. Step 3: Cross multiply
    626,995.62x = 865,009.80 × 355,000.86
  4. Step 4: Simplify right side
    626,995.62x = 307,079,222,908.43
  5. Step 5: Solve for x
    x = 307,079,222,908.43/626,995.62
  6. Step 6: Final answer
    x = 489,762.95

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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.