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Finding the Fourth Proportional to 319,766.40, 479,059.20 and 186,710.40

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Solution

The fourth proportional to 319,766.40, 479,059.20 and 186,710.40 is: 279,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,766.40 : 479,059.20 = 186,710.40 : x
  2. Step 2: Convert to fraction form
    319,766.40/479,059.20 = 186,710.40/x
  3. Step 3: Cross multiply
    319,766.40x = 479,059.20 × 186,710.40
  4. Step 4: Simplify right side
    319,766.40x = 89,445,334,855.68
  5. Step 5: Solve for x
    x = 89,445,334,855.68/319,766.40
  6. Step 6: Final answer
    x = 279,720.87

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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.