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Finding the Fourth Proportional to 657,015.40, 983,679.90 and 638,583.40

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Solution

The fourth proportional to 657,015.40, 983,679.90 and 638,583.40 is: 956,083.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,015.40 : 983,679.90 = 638,583.40 : x
  2. Step 2: Convert to fraction form
    657,015.40/983,679.90 = 638,583.40/x
  3. Step 3: Cross multiply
    657,015.40x = 983,679.90 × 638,583.40
  4. Step 4: Simplify right side
    657,015.40x = 628,161,655,053.66
  5. Step 5: Solve for x
    x = 628,161,655,053.66/657,015.40
  6. Step 6: Final answer
    x = 956,083.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.