Home / 411,295,708.20-612,668,783.39-389,018,587.22

Finding the Fourth Proportional to 411,295,708.20, 612,668,783.39 and 389,018,587.22

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Solution

The fourth proportional to 411,295,708.20, 612,668,783.39 and 389,018,587.22 is: 579,484,637.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,295,708.20 : 612,668,783.39 = 389,018,587.22 : x
  2. Step 2: Convert to fraction form
    411,295,708.20/612,668,783.39 = 389,018,587.22/x
  3. Step 3: Cross multiply
    411,295,708.20x = 612,668,783.39 × 389,018,587.22
  4. Step 4: Simplify right side
    411,295,708.20x = 238,339,544,543,165,536
  5. Step 5: Solve for x
    x = 238,339,544,543,165,536/411,295,708.20
  6. Step 6: Final answer
    x = 579,484,637.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.