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Finding the Fourth Proportional to 485,223.39, 669,610.93 and 281,395.16

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Solution

The fourth proportional to 485,223.39, 669,610.93 and 281,395.16 is: 388,326.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,223.39 : 669,610.93 = 281,395.16 : x
  2. Step 2: Convert to fraction form
    485,223.39/669,610.93 = 281,395.16/x
  3. Step 3: Cross multiply
    485,223.39x = 669,610.93 × 281,395.16
  4. Step 4: Simplify right side
    485,223.39x = 188,425,274,785.10
  5. Step 5: Solve for x
    x = 188,425,274,785.10/485,223.39
  6. Step 6: Final answer
    x = 388,326.86

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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.