Home / 717,905.14-990,715.59-395,626.78

Finding the Fourth Proportional to 717,905.14, 990,715.59 and 395,626.78

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Solution

The fourth proportional to 717,905.14, 990,715.59 and 395,626.78 is: 545,968.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,905.14 : 990,715.59 = 395,626.78 : x
  2. Step 2: Convert to fraction form
    717,905.14/990,715.59 = 395,626.78/x
  3. Step 3: Cross multiply
    717,905.14x = 990,715.59 × 395,626.78
  4. Step 4: Simplify right side
    717,905.14x = 391,953,618,767.50
  5. Step 5: Solve for x
    x = 391,953,618,767.50/717,905.14
  6. Step 6: Final answer
    x = 545,968.54

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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.