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Finding the Fourth Proportional to 657,840.86, 907,820.37 and 356,034.86

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Solution

The fourth proportional to 657,840.86, 907,820.37 and 356,034.86 is: 491,328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,840.86 : 907,820.37 = 356,034.86 : x
  2. Step 2: Convert to fraction form
    657,840.86/907,820.37 = 356,034.86/x
  3. Step 3: Cross multiply
    657,840.86x = 907,820.37 × 356,034.86
  4. Step 4: Simplify right side
    657,840.86x = 323,215,698,338.10
  5. Step 5: Solve for x
    x = 323,215,698,338.10/657,840.86
  6. Step 6: Final answer
    x = 491,328.10

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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.