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Finding the Fourth Proportional to 285,549.40, 428,325.06 and 72,317.24

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Solution

The fourth proportional to 285,549.40, 428,325.06 and 72,317.24 is: 108,476.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,549.40 : 428,325.06 = 72,317.24 : x
  2. Step 2: Convert to fraction form
    285,549.40/428,325.06 = 72,317.24/x
  3. Step 3: Cross multiply
    285,549.40x = 428,325.06 × 72,317.24
  4. Step 4: Simplify right side
    285,549.40x = 30,975,286,162.03
  5. Step 5: Solve for x
    x = 30,975,286,162.03/285,549.40
  6. Step 6: Final answer
    x = 108,476.10

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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.