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Finding the Fourth Proportional to 485,668.96, 670,646.14 and 304,692

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Solution

The fourth proportional to 485,668.96, 670,646.14 and 304,692 is: 420,740.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,668.96 : 670,646.14 = 304,692 : x
  2. Step 2: Convert to fraction form
    485,668.96/670,646.14 = 304,692/x
  3. Step 3: Cross multiply
    485,668.96x = 670,646.14 × 304,692
  4. Step 4: Simplify right side
    485,668.96x = 204,340,513,688.88
  5. Step 5: Solve for x
    x = 204,340,513,688.88/485,668.96
  6. Step 6: Final answer
    x = 420,740.32

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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.