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Finding the Fourth Proportional to 717,957.06, 990,780.75 and 395,667.15

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Solution

The fourth proportional to 717,957.06, 990,780.75 and 395,667.15 is: 546,020.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,957.06 : 990,780.75 = 395,667.15 : x
  2. Step 2: Convert to fraction form
    717,957.06/990,780.75 = 395,667.15/x
  3. Step 3: Cross multiply
    717,957.06x = 990,780.75 × 395,667.15
  4. Step 4: Simplify right side
    717,957.06x = 392,019,391,911.94
  5. Step 5: Solve for x
    x = 392,019,391,911.94/717,957.06
  6. Step 6: Final answer
    x = 546,020.67

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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.