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Finding the Fourth Proportional to 390,892.70, 539,768.59 and 245,940.16

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Solution

The fourth proportional to 390,892.70, 539,768.59 and 245,940.16 is: 339,609.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,892.70 : 539,768.59 = 245,940.16 : x
  2. Step 2: Convert to fraction form
    390,892.70/539,768.59 = 245,940.16/x
  3. Step 3: Cross multiply
    390,892.70x = 539,768.59 × 245,940.16
  4. Step 4: Simplify right side
    390,892.70x = 132,750,771,423.30
  5. Step 5: Solve for x
    x = 132,750,771,423.30/390,892.70
  6. Step 6: Final answer
    x = 339,609.24

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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.