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Finding the Fourth Proportional to 610,638.85, 915,960.62 and 255,403.67

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Solution

The fourth proportional to 610,638.85, 915,960.62 and 255,403.67 is: 383,106.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,638.85 : 915,960.62 = 255,403.67 : x
  2. Step 2: Convert to fraction form
    610,638.85/915,960.62 = 255,403.67/x
  3. Step 3: Cross multiply
    610,638.85x = 915,960.62 × 255,403.67
  4. Step 4: Simplify right side
    610,638.85x = 233,939,699,982.18
  5. Step 5: Solve for x
    x = 233,939,699,982.18/610,638.85
  6. Step 6: Final answer
    x = 383,106.48

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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.