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Finding the Fourth Proportional to 643,557.90, 888,113.79 and 357,083.58

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Solution

The fourth proportional to 643,557.90, 888,113.79 and 357,083.58 is: 492,777.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,557.90 : 888,113.79 = 357,083.58 : x
  2. Step 2: Convert to fraction form
    643,557.90/888,113.79 = 357,083.58/x
  3. Step 3: Cross multiply
    643,557.90x = 888,113.79 × 357,083.58
  4. Step 4: Simplify right side
    643,557.90x = 317,130,851,580.57
  5. Step 5: Solve for x
    x = 317,130,851,580.57/643,557.90
  6. Step 6: Final answer
    x = 492,777.50

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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.