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Finding the Fourth Proportional to 485,332.05, 669,760.48 and 281,503.65

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Solution

The fourth proportional to 485,332.05, 669,760.48 and 281,503.65 is: 388,476.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,332.05 : 669,760.48 = 281,503.65 : x
  2. Step 2: Convert to fraction form
    485,332.05/669,760.48 = 281,503.65/x
  3. Step 3: Cross multiply
    485,332.05x = 669,760.48 × 281,503.65
  4. Step 4: Simplify right side
    485,332.05x = 188,540,018,338.23
  5. Step 5: Solve for x
    x = 188,540,018,338.23/485,332.05
  6. Step 6: Final answer
    x = 388,476.34

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1.5x scale

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.