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Finding the Fourth Proportional to 319,230.30, 478,845.45 and 186,260.70

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Solution

The fourth proportional to 319,230.30, 478,845.45 and 186,260.70 is: 279,391.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,230.30 : 478,845.45 = 186,260.70 : x
  2. Step 2: Convert to fraction form
    319,230.30/478,845.45 = 186,260.70/x
  3. Step 3: Cross multiply
    319,230.30x = 478,845.45 × 186,260.70
  4. Step 4: Simplify right side
    319,230.30x = 89,190,088,708.82
  5. Step 5: Solve for x
    x = 89,190,088,708.82/319,230.30
  6. Step 6: Final answer
    x = 279,391.05

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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.