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Finding the Fourth Proportional to 641,386.96, 885,101.52 and 354,907.24

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Solution

The fourth proportional to 641,386.96, 885,101.52 and 354,907.24 is: 489,765.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,386.96 : 885,101.52 = 354,907.24 : x
  2. Step 2: Convert to fraction form
    641,386.96/885,101.52 = 354,907.24/x
  3. Step 3: Cross multiply
    641,386.96x = 885,101.52 × 354,907.24
  4. Step 4: Simplify right side
    641,386.96x = 314,128,937,583.01
  5. Step 5: Solve for x
    x = 314,128,937,583.01/641,386.96
  6. Step 6: Final answer
    x = 489,765.08

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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.