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Finding the Fourth Proportional to 390,040.69, 585,172.51 and 230,262.40

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Solution

The fourth proportional to 390,040.69, 585,172.51 and 230,262.40 is: 345,459.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,040.69 : 585,172.51 = 230,262.40 : x
  2. Step 2: Convert to fraction form
    390,040.69/585,172.51 = 230,262.40/x
  3. Step 3: Cross multiply
    390,040.69x = 585,172.51 × 230,262.40
  4. Step 4: Simplify right side
    390,040.69x = 134,743,225,049.87
  5. Step 5: Solve for x
    x = 134,743,225,049.87/390,040.69
  6. Step 6: Final answer
    x = 345,459.41

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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.