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Finding the Fourth Proportional to 661,187.12, 912,403.24 and 374,710.64

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Solution

The fourth proportional to 661,187.12, 912,403.24 and 374,710.64 is: 517,080.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,187.12 : 912,403.24 = 374,710.64 : x
  2. Step 2: Convert to fraction form
    661,187.12/912,403.24 = 374,710.64/x
  3. Step 3: Cross multiply
    661,187.12x = 912,403.24 × 374,710.64
  4. Step 4: Simplify right side
    661,187.12x = 341,887,201,998.47
  5. Step 5: Solve for x
    x = 341,887,201,998.47/661,187.12
  6. Step 6: Final answer
    x = 517,080.86

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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.