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Finding the Fourth Proportional to 325,115.80, 487,673.70 and 289,864.60

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Solution

The fourth proportional to 325,115.80, 487,673.70 and 289,864.60 is: 434,796.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,115.80 : 487,673.70 = 289,864.60 : x
  2. Step 2: Convert to fraction form
    325,115.80/487,673.70 = 289,864.60/x
  3. Step 3: Cross multiply
    325,115.80x = 487,673.70 × 289,864.60
  4. Step 4: Simplify right side
    325,115.80x = 141,359,341,981.02
  5. Step 5: Solve for x
    x = 141,359,341,981.02/325,115.80
  6. Step 6: Final answer
    x = 434,796.90

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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.