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Finding the Fourth Proportional to 617,876.70, 926,815.05 and 485,166.30

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Solution

The fourth proportional to 617,876.70, 926,815.05 and 485,166.30 is: 727,749.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,876.70 : 926,815.05 = 485,166.30 : x
  2. Step 2: Convert to fraction form
    617,876.70/926,815.05 = 485,166.30/x
  3. Step 3: Cross multiply
    617,876.70x = 926,815.05 × 485,166.30
  4. Step 4: Simplify right side
    617,876.70x = 449,659,428,592.82
  5. Step 5: Solve for x
    x = 449,659,428,592.82/617,876.70
  6. Step 6: Final answer
    x = 727,749.45

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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.