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Finding the Fourth Proportional to 319,396.88, 479,095.32 and 129,812.83

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Solution

The fourth proportional to 319,396.88, 479,095.32 and 129,812.83 is: 194,719.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,396.88 : 479,095.32 = 129,812.83 : x
  2. Step 2: Convert to fraction form
    319,396.88/479,095.32 = 129,812.83/x
  3. Step 3: Cross multiply
    319,396.88x = 479,095.32 × 129,812.83
  4. Step 4: Simplify right side
    319,396.88x = 62,192,716,284.41
  5. Step 5: Solve for x
    x = 62,192,716,284.41/319,396.88
  6. Step 6: Final answer
    x = 194,719.24

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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.