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Finding the Fourth Proportional to 279,478.95, 419,283.50 and 79,802.07

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Solution

The fourth proportional to 279,478.95, 419,283.50 and 79,802.07 is: 119,721.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,478.95 : 419,283.50 = 79,802.07 : x
  2. Step 2: Convert to fraction form
    279,478.95/419,283.50 = 79,802.07/x
  3. Step 3: Cross multiply
    279,478.95x = 419,283.50 × 79,802.07
  4. Step 4: Simplify right side
    279,478.95x = 33,459,690,817.83
  5. Step 5: Solve for x
    x = 33,459,690,817.83/279,478.95
  6. Step 6: Final answer
    x = 119,721.69

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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.