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Finding the Fourth Proportional to 390,962.40, 586,180.80 and 154,183.20

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Solution

The fourth proportional to 390,962.40, 586,180.80 and 154,183.20 is: 231,171.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,962.40 : 586,180.80 = 154,183.20 : x
  2. Step 2: Convert to fraction form
    390,962.40/586,180.80 = 154,183.20/x
  3. Step 3: Cross multiply
    390,962.40x = 586,180.80 × 154,183.20
  4. Step 4: Simplify right side
    390,962.40x = 90,379,231,522.56
  5. Step 5: Solve for x
    x = 90,379,231,522.56/390,962.40
  6. Step 6: Final answer
    x = 231,171.16

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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.