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Finding the Fourth Proportional to 403,792.80, 605,008.80 and 319,228.80

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Solution

The fourth proportional to 403,792.80, 605,008.80 and 319,228.80 is: 478,305.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,792.80 : 605,008.80 = 319,228.80 : x
  2. Step 2: Convert to fraction form
    403,792.80/605,008.80 = 319,228.80/x
  3. Step 3: Cross multiply
    403,792.80x = 605,008.80 × 319,228.80
  4. Step 4: Simplify right side
    403,792.80x = 193,136,233,213.44
  5. Step 5: Solve for x
    x = 193,136,233,213.44/403,792.80
  6. Step 6: Final answer
    x = 478,305.29

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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.