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Finding the Fourth Proportional to 1,428,857.67, 1,971,849.02 and 784,337.79

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Solution

The fourth proportional to 1,428,857.67, 1,971,849.02 and 784,337.79 is: 1,082,400.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,857.67 : 1,971,849.02 = 784,337.79 : x
  2. Step 2: Convert to fraction form
    1,428,857.67/1,971,849.02 = 784,337.79/x
  3. Step 3: Cross multiply
    1,428,857.67x = 1,971,849.02 × 784,337.79
  4. Step 4: Simplify right side
    1,428,857.67x = 1,546,595,698,638.78
  5. Step 5: Solve for x
    x = 1,546,595,698,638.78/1,428,857.67
  6. Step 6: Final answer
    x = 1,082,400.11

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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.