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Finding the Fourth Proportional to 657,489.54, 985,411.05 and 353,135.76

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Solution

The fourth proportional to 657,489.54, 985,411.05 and 353,135.76 is: 529,261.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,489.54 : 985,411.05 = 353,135.76 : x
  2. Step 2: Convert to fraction form
    657,489.54/985,411.05 = 353,135.76/x
  3. Step 3: Cross multiply
    657,489.54x = 985,411.05 × 353,135.76
  4. Step 4: Simplify right side
    657,489.54x = 347,983,880,054.15
  5. Step 5: Solve for x
    x = 347,983,880,054.15/657,489.54
  6. Step 6: Final answer
    x = 529,261.47

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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.