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Finding the Fourth Proportional to 279,841.71, 419,762.54 and 69,479.64

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Solution

The fourth proportional to 279,841.71, 419,762.54 and 69,479.64 is: 104,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,841.71 : 419,762.54 = 69,479.64 : x
  2. Step 2: Convert to fraction form
    279,841.71/419,762.54 = 69,479.64/x
  3. Step 3: Cross multiply
    279,841.71x = 419,762.54 × 69,479.64
  4. Step 4: Simplify right side
    279,841.71x = 29,164,949,817.29
  5. Step 5: Solve for x
    x = 29,164,949,817.29/279,841.71
  6. Step 6: Final answer
    x = 104,219.45

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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.