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Finding the Fourth Proportional to 648,129.50, 972,345.45 and 221,668.62

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Solution

The fourth proportional to 648,129.50, 972,345.45 and 221,668.62 is: 332,554.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,129.50 : 972,345.45 = 221,668.62 : x
  2. Step 2: Convert to fraction form
    648,129.50/972,345.45 = 221,668.62/x
  3. Step 3: Cross multiply
    648,129.50x = 972,345.45 × 221,668.62
  4. Step 4: Simplify right side
    648,129.50x = 215,538,474,064.78
  5. Step 5: Solve for x
    x = 215,538,474,064.78/648,129.50
  6. Step 6: Final answer
    x = 332,554.64

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Double scale
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1.5x scale

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.