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Finding the Fourth Proportional to 228,636.47, 315,672.30 and 142,726.25

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Solution

The fourth proportional to 228,636.47, 315,672.30 and 142,726.25 is: 197,058.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,636.47 : 315,672.30 = 142,726.25 : x
  2. Step 2: Convert to fraction form
    228,636.47/315,672.30 = 142,726.25/x
  3. Step 3: Cross multiply
    228,636.47x = 315,672.30 × 142,726.25
  4. Step 4: Simplify right side
    228,636.47x = 45,054,722,029.51
  5. Step 5: Solve for x
    x = 45,054,722,029.51/228,636.47
  6. Step 6: Final answer
    x = 197,058.34

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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.