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Finding the Fourth Proportional to 210,804.80, 315,439.20 and 155,508.80

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Solution

The fourth proportional to 210,804.80, 315,439.20 and 155,508.80 is: 232,696.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,804.80 : 315,439.20 = 155,508.80 : x
  2. Step 2: Convert to fraction form
    210,804.80/315,439.20 = 155,508.80/x
  3. Step 3: Cross multiply
    210,804.80x = 315,439.20 × 155,508.80
  4. Step 4: Simplify right side
    210,804.80x = 49,053,571,464.96
  5. Step 5: Solve for x
    x = 49,053,571,464.96/210,804.80
  6. Step 6: Final answer
    x = 232,696.65

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1.5x scale

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.