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Finding the Fourth Proportional to 641,866.09, 885,802.90 and 355,386.17

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Solution

The fourth proportional to 641,866.09, 885,802.90 and 355,386.17 is: 490,448.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,866.09 : 885,802.90 = 355,386.17 : x
  2. Step 2: Convert to fraction form
    641,866.09/885,802.90 = 355,386.17/x
  3. Step 3: Cross multiply
    641,866.09x = 885,802.90 × 355,386.17
  4. Step 4: Simplify right side
    641,866.09x = 314,802,100,005.89
  5. Step 5: Solve for x
    x = 314,802,100,005.89/641,866.09
  6. Step 6: Final answer
    x = 490,448.25

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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.