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Finding the Fourth Proportional to 640,835.65, 961,308.15 and 167,520.25

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Solution

The fourth proportional to 640,835.65, 961,308.15 and 167,520.25 is: 251,294.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,835.65 : 961,308.15 = 167,520.25 : x
  2. Step 2: Convert to fraction form
    640,835.65/961,308.15 = 167,520.25/x
  3. Step 3: Cross multiply
    640,835.65x = 961,308.15 × 167,520.25
  4. Step 4: Simplify right side
    640,835.65x = 161,038,581,615.04
  5. Step 5: Solve for x
    x = 161,038,581,615.04/640,835.65
  6. Step 6: Final answer
    x = 251,294.67

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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.