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Finding the Fourth Proportional to 663,052.37, 915,121.94 and 391,186.71

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Solution

The fourth proportional to 663,052.37, 915,121.94 and 391,186.71 is: 539,902.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,052.37 : 915,121.94 = 391,186.71 : x
  2. Step 2: Convert to fraction form
    663,052.37/915,121.94 = 391,186.71/x
  3. Step 3: Cross multiply
    663,052.37x = 915,121.94 × 391,186.71
  4. Step 4: Simplify right side
    663,052.37x = 357,983,539,001.48
  5. Step 5: Solve for x
    x = 357,983,539,001.48/663,052.37
  6. Step 6: Final answer
    x = 539,902.36

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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.