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Finding the Fourth Proportional to 1,267,953.76, 1,749,955.50 and 784,674.64

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Solution

The fourth proportional to 1,267,953.76, 1,749,955.50 and 784,674.64 is: 1,082,961.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267,953.76 : 1,749,955.50 = 784,674.64 : x
  2. Step 2: Convert to fraction form
    1,267,953.76/1,749,955.50 = 784,674.64/x
  3. Step 3: Cross multiply
    1,267,953.76x = 1,749,955.50 × 784,674.64
  4. Step 4: Simplify right side
    1,267,953.76x = 1,373,145,701,978.52
  5. Step 5: Solve for x
    x = 1,373,145,701,978.52/1,267,953.76
  6. Step 6: Final answer
    x = 1,082,961.97

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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.