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Finding the Fourth Proportional to 641,592.76, 885,387.27 and 355,106.71

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Solution

The fourth proportional to 641,592.76, 885,387.27 and 355,106.71 is: 490,041.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,592.76 : 885,387.27 = 355,106.71 : x
  2. Step 2: Convert to fraction form
    641,592.76/885,387.27 = 355,106.71/x
  3. Step 3: Cross multiply
    641,592.76x = 885,387.27 × 355,106.71
  4. Step 4: Simplify right side
    641,592.76x = 314,406,960,525.58
  5. Step 5: Solve for x
    x = 314,406,960,525.58/641,592.76
  6. Step 6: Final answer
    x = 490,041.32

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Double scale
Find fourth proportional to 641,593.76, 885,388.65 and 355,107.71
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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.