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Finding the Fourth Proportional to 262,415.87, 393,602.16 and 72,880.69

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Solution

The fourth proportional to 262,415.87, 393,602.16 and 72,880.69 is: 109,315.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,415.87 : 393,602.16 = 72,880.69 : x
  2. Step 2: Convert to fraction form
    262,415.87/393,602.16 = 72,880.69/x
  3. Step 3: Cross multiply
    262,415.87x = 393,602.16 × 72,880.69
  4. Step 4: Simplify right side
    262,415.87x = 28,685,998,263.67
  5. Step 5: Solve for x
    x = 28,685,998,263.67/262,415.87
  6. Step 6: Final answer
    x = 109,315.03

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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.