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Finding the Fourth Proportional to 668,897.84, 921,563.96 and 637,011.36

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Solution

The fourth proportional to 668,897.84, 921,563.96 and 637,011.36 is: 877,632.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,897.84 : 921,563.96 = 637,011.36 : x
  2. Step 2: Convert to fraction form
    668,897.84/921,563.96 = 637,011.36/x
  3. Step 3: Cross multiply
    668,897.84x = 921,563.96 × 637,011.36
  4. Step 4: Simplify right side
    668,897.84x = 587,046,711,486.59
  5. Step 5: Solve for x
    x = 587,046,711,486.59/668,897.84
  6. Step 6: Final answer
    x = 877,632.84

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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.