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Finding the Fourth Proportional to 485,284.56, 669,695.28 and 281,456.28

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Solution

The fourth proportional to 485,284.56, 669,695.28 and 281,456.28 is: 388,411.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,284.56 : 669,695.28 = 281,456.28 : x
  2. Step 2: Convert to fraction form
    485,284.56/669,695.28 = 281,456.28/x
  3. Step 3: Cross multiply
    485,284.56x = 669,695.28 × 281,456.28
  4. Step 4: Simplify right side
    485,284.56x = 188,489,942,242.36
  5. Step 5: Solve for x
    x = 188,489,942,242.36/485,284.56
  6. Step 6: Final answer
    x = 388,411.17

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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.