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Finding the Fourth Proportional to 640,649.88, 961,556.94 and 341,386.20

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Solution

The fourth proportional to 640,649.88, 961,556.94 and 341,386.20 is: 512,389.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,649.88 : 961,556.94 = 341,386.20 : x
  2. Step 2: Convert to fraction form
    640,649.88/961,556.94 = 341,386.20/x
  3. Step 3: Cross multiply
    640,649.88x = 961,556.94 × 341,386.20
  4. Step 4: Simplify right side
    640,649.88x = 328,262,269,830.23
  5. Step 5: Solve for x
    x = 328,262,269,830.23/640,649.88
  6. Step 6: Final answer
    x = 512,389.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.