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Finding the Fourth Proportional to 571,488.16, 856,402.80 and 321,636.64

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Solution

The fourth proportional to 571,488.16, 856,402.80 and 321,636.64 is: 481,988.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,488.16 : 856,402.80 = 321,636.64 : x
  2. Step 2: Convert to fraction form
    571,488.16/856,402.80 = 321,636.64/x
  3. Step 3: Cross multiply
    571,488.16x = 856,402.80 × 321,636.64
  4. Step 4: Simplify right side
    571,488.16x = 275,450,519,078.59
  5. Step 5: Solve for x
    x = 275,450,519,078.59/571,488.16
  6. Step 6: Final answer
    x = 481,988.15

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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.