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Finding the Fourth Proportional to 657,755.90, 907,705.98 and 355,949.90

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Solution

The fourth proportional to 657,755.90, 907,705.98 and 355,949.90 is: 491,212.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,755.90 : 907,705.98 = 355,949.90 : x
  2. Step 2: Convert to fraction form
    657,755.90/907,705.98 = 355,949.90/x
  3. Step 3: Cross multiply
    657,755.90x = 907,705.98 × 355,949.90
  4. Step 4: Simplify right side
    657,755.90x = 323,097,852,810.40
  5. Step 5: Solve for x
    x = 323,097,852,810.40/657,755.90
  6. Step 6: Final answer
    x = 491,212.40

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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.