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Finding the Fourth Proportional to 492,280.71, 679,515.30 and 288,396.69

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Solution

The fourth proportional to 492,280.71, 679,515.30 and 288,396.69 is: 398,085.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,280.71 : 679,515.30 = 288,396.69 : x
  2. Step 2: Convert to fraction form
    492,280.71/679,515.30 = 288,396.69/x
  3. Step 3: Cross multiply
    492,280.71x = 679,515.30 × 288,396.69
  4. Step 4: Simplify right side
    492,280.71x = 195,969,963,324.36
  5. Step 5: Solve for x
    x = 195,969,963,324.36/492,280.71
  6. Step 6: Final answer
    x = 398,085.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.