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Finding the Fourth Proportional to 486,706.80, 671,674.50 and 282,755.28

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Solution

The fourth proportional to 486,706.80, 671,674.50 and 282,755.28 is: 390,213.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,706.80 : 671,674.50 = 282,755.28 : x
  2. Step 2: Convert to fraction form
    486,706.80/671,674.50 = 282,755.28/x
  3. Step 3: Cross multiply
    486,706.80x = 671,674.50 × 282,755.28
  4. Step 4: Simplify right side
    486,706.80x = 189,919,511,316.36
  5. Step 5: Solve for x
    x = 189,919,511,316.36/486,706.80
  6. Step 6: Final answer
    x = 390,213.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.