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Finding the Fourth Proportional to 628,363.80, 942,545.70 and 328,728.60

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Solution

The fourth proportional to 628,363.80, 942,545.70 and 328,728.60 is: 493,092.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,363.80 : 942,545.70 = 328,728.60 : x
  2. Step 2: Convert to fraction form
    628,363.80/942,545.70 = 328,728.60/x
  3. Step 3: Cross multiply
    628,363.80x = 942,545.70 × 328,728.60
  4. Step 4: Simplify right side
    628,363.80x = 309,841,728,397.02
  5. Step 5: Solve for x
    x = 309,841,728,397.02/628,363.80
  6. Step 6: Final answer
    x = 493,092.90

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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.