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Finding the Fourth Proportional to 371,730.40, 512,989.23 and 210,615.28

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Solution

The fourth proportional to 371,730.40, 512,989.23 and 210,615.28 is: 290,649.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,730.40 : 512,989.23 = 210,615.28 : x
  2. Step 2: Convert to fraction form
    371,730.40/512,989.23 = 210,615.28/x
  3. Step 3: Cross multiply
    371,730.40x = 512,989.23 × 210,615.28
  4. Step 4: Simplify right side
    371,730.40x = 108,043,370,313.43
  5. Step 5: Solve for x
    x = 108,043,370,313.43/371,730.40
  6. Step 6: Final answer
    x = 290,649.81

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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.