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Finding the Fourth Proportional to 766,805.40, 1,150,208.10 and 684,136.80

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Solution

The fourth proportional to 766,805.40, 1,150,208.10 and 684,136.80 is: 1,026,205.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,805.40 : 1,150,208.10 = 684,136.80 : x
  2. Step 2: Convert to fraction form
    766,805.40/1,150,208.10 = 684,136.80/x
  3. Step 3: Cross multiply
    766,805.40x = 1,150,208.10 × 684,136.80
  4. Step 4: Simplify right side
    766,805.40x = 786,899,688,868.08
  5. Step 5: Solve for x
    x = 786,899,688,868.08/766,805.40
  6. Step 6: Final answer
    x = 1,026,205.20

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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.