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Finding the Fourth Proportional to 353,218.07, 488,724.49 and 307,990.30

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Solution

The fourth proportional to 353,218.07, 488,724.49 and 307,990.30 is: 426,145.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,218.07 : 488,724.49 = 307,990.30 : x
  2. Step 2: Convert to fraction form
    353,218.07/488,724.49 = 307,990.30/x
  3. Step 3: Cross multiply
    353,218.07x = 488,724.49 × 307,990.30
  4. Step 4: Simplify right side
    353,218.07x = 150,522,402,292.45
  5. Step 5: Solve for x
    x = 150,522,402,292.45/353,218.07
  6. Step 6: Final answer
    x = 426,145.81

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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.