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Finding the Fourth Proportional to 614,615.16, 921,709.53 and 215,247.12

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Solution

The fourth proportional to 614,615.16, 921,709.53 and 215,247.12 is: 322,796.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,615.16 : 921,709.53 = 215,247.12 : x
  2. Step 2: Convert to fraction form
    614,615.16/921,709.53 = 215,247.12/x
  3. Step 3: Cross multiply
    614,615.16x = 921,709.53 × 215,247.12
  4. Step 4: Simplify right side
    614,615.16x = 198,395,321,809.05
  5. Step 5: Solve for x
    x = 198,395,321,809.05/614,615.16
  6. Step 6: Final answer
    x = 322,796.01

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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.