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Finding the Fourth Proportional to 210,295.04, 315,321.36 and 143,815.74

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Solution

The fourth proportional to 210,295.04, 315,321.36 and 143,815.74 is: 215,640.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,295.04 : 315,321.36 = 143,815.74 : x
  2. Step 2: Convert to fraction form
    210,295.04/315,321.36 = 143,815.74/x
  3. Step 3: Cross multiply
    210,295.04x = 315,321.36 × 143,815.74
  4. Step 4: Simplify right side
    210,295.04x = 45,348,174,726.21
  5. Step 5: Solve for x
    x = 45,348,174,726.21/210,295.04
  6. Step 6: Final answer
    x = 215,640.72

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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.