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Finding the Fourth Proportional to 613,600.80, 920,401.20 and 456,136.80

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Solution

The fourth proportional to 613,600.80, 920,401.20 and 456,136.80 is: 684,205.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,600.80 : 920,401.20 = 456,136.80 : x
  2. Step 2: Convert to fraction form
    613,600.80/920,401.20 = 456,136.80/x
  3. Step 3: Cross multiply
    613,600.80x = 920,401.20 × 456,136.80
  4. Step 4: Simplify right side
    613,600.80x = 419,828,858,084.16
  5. Step 5: Solve for x
    x = 419,828,858,084.16/613,600.80
  6. Step 6: Final answer
    x = 684,205.20

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Half scale
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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.