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Finding the Fourth Proportional to 459,083.80, 688,625.70 and 409,220.20

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Solution

The fourth proportional to 459,083.80, 688,625.70 and 409,220.20 is: 613,830.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,083.80 : 688,625.70 = 409,220.20 : x
  2. Step 2: Convert to fraction form
    459,083.80/688,625.70 = 409,220.20/x
  3. Step 3: Cross multiply
    459,083.80x = 688,625.70 × 409,220.20
  4. Step 4: Simplify right side
    459,083.80x = 281,799,546,679.14
  5. Step 5: Solve for x
    x = 281,799,546,679.14/459,083.80
  6. Step 6: Final answer
    x = 613,830.30

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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.