Home / 717,834.05-990,655.20-395,544.09

Finding the Fourth Proportional to 717,834.05, 990,655.20 and 395,544.09

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Solution

The fourth proportional to 717,834.05, 990,655.20 and 395,544.09 is: 545,875.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,834.05 : 990,655.20 = 395,544.09 : x
  2. Step 2: Convert to fraction form
    717,834.05/990,655.20 = 395,544.09/x
  3. Step 3: Cross multiply
    717,834.05x = 990,655.20 × 395,544.09
  4. Step 4: Simplify right side
    717,834.05x = 391,847,809,587.77
  5. Step 5: Solve for x
    x = 391,847,809,587.77/717,834.05
  6. Step 6: Final answer
    x = 545,875.21

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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.