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Finding the Fourth Proportional to 695,655, 959,785.99 and 389,690.05

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Solution

The fourth proportional to 695,655, 959,785.99 and 389,690.05 is: 537,650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,655 : 959,785.99 = 389,690.05 : x
  2. Step 2: Convert to fraction form
    695,655/959,785.99 = 389,690.05/x
  3. Step 3: Cross multiply
    695,655x = 959,785.99 × 389,690.05
  4. Step 4: Simplify right side
    695,655x = 374,019,050,432.40
  5. Step 5: Solve for x
    x = 374,019,050,432.40/695,655
  6. Step 6: Final answer
    x = 537,650.20

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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.