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Finding the Fourth Proportional to 695,655.10, 959,786.13 and 389,690.16

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Solution

The fourth proportional to 695,655.10, 959,786.13 and 389,690.16 is: 537,650.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,655.10 : 959,786.13 = 389,690.16 : x
  2. Step 2: Convert to fraction form
    695,655.10/959,786.13 = 389,690.16/x
  3. Step 3: Cross multiply
    695,655.10x = 959,786.13 × 389,690.16
  4. Step 4: Simplify right side
    695,655.10x = 374,019,210,565.48
  5. Step 5: Solve for x
    x = 374,019,210,565.48/695,655.10
  6. Step 6: Final answer
    x = 537,650.35

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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.