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Finding the Fourth Proportional to 373,729.21, 515,678.40 and 220,792.30

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Solution

The fourth proportional to 373,729.21, 515,678.40 and 220,792.30 is: 304,653.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,729.21 : 515,678.40 = 220,792.30 : x
  2. Step 2: Convert to fraction form
    373,729.21/515,678.40 = 220,792.30/x
  3. Step 3: Cross multiply
    373,729.21x = 515,678.40 × 220,792.30
  4. Step 4: Simplify right side
    373,729.21x = 113,857,818,707.12
  5. Step 5: Solve for x
    x = 113,857,818,707.12/373,729.21
  6. Step 6: Final answer
    x = 304,653.25

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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.