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Finding the Fourth Proportional to 371,388.66, 512,638.29 and 218,420.16

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Solution

The fourth proportional to 371,388.66, 512,638.29 and 218,420.16 is: 301,491.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,388.66 : 512,638.29 = 218,420.16 : x
  2. Step 2: Convert to fraction form
    371,388.66/512,638.29 = 218,420.16/x
  3. Step 3: Cross multiply
    371,388.66x = 512,638.29 × 218,420.16
  4. Step 4: Simplify right side
    371,388.66x = 111,970,537,323.93
  5. Step 5: Solve for x
    x = 111,970,537,323.93/371,388.66
  6. Step 6: Final answer
    x = 301,491.54

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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.