Home / 644,584.31-889,542.18-354,193.51

Finding the Fourth Proportional to 644,584.31, 889,542.18 and 354,193.51

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Solution

The fourth proportional to 644,584.31, 889,542.18 and 354,193.51 is: 488,795.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,584.31 : 889,542.18 = 354,193.51 : x
  2. Step 2: Convert to fraction form
    644,584.31/889,542.18 = 354,193.51/x
  3. Step 3: Cross multiply
    644,584.31x = 889,542.18 × 354,193.51
  4. Step 4: Simplify right side
    644,584.31x = 315,070,064,803.40
  5. Step 5: Solve for x
    x = 315,070,064,803.40/644,584.31
  6. Step 6: Final answer
    x = 488,795.74

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Double scale
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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.