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Finding the Fourth Proportional to 807,866.70, 1,211,800.05 and 275,340.30

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Solution

The fourth proportional to 807,866.70, 1,211,800.05 and 275,340.30 is: 413,010.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,866.70 : 1,211,800.05 = 275,340.30 : x
  2. Step 2: Convert to fraction form
    807,866.70/1,211,800.05 = 275,340.30/x
  3. Step 3: Cross multiply
    807,866.70x = 1,211,800.05 × 275,340.30
  4. Step 4: Simplify right side
    807,866.70x = 333,657,389,307.02
  5. Step 5: Solve for x
    x = 333,657,389,307.02/807,866.70
  6. Step 6: Final answer
    x = 413,010.45

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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.