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Finding the Fourth Proportional to 520,945.84, 781,263.24 and 221,425.12

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Solution

The fourth proportional to 520,945.84, 781,263.24 and 221,425.12 is: 332,071.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,945.84 : 781,263.24 = 221,425.12 : x
  2. Step 2: Convert to fraction form
    520,945.84/781,263.24 = 221,425.12/x
  3. Step 3: Cross multiply
    520,945.84x = 781,263.24 × 221,425.12
  4. Step 4: Simplify right side
    520,945.84x = 172,991,306,668.59
  5. Step 5: Solve for x
    x = 172,991,306,668.59/520,945.84
  6. Step 6: Final answer
    x = 332,071.58

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Double scale
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Similar ratio
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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.