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Finding the Fourth Proportional to 657,290.50, 907,060.89 and 355,484.50

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Solution

The fourth proportional to 657,290.50, 907,060.89 and 355,484.50 is: 490,568.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,290.50 : 907,060.89 = 355,484.50 : x
  2. Step 2: Convert to fraction form
    657,290.50/907,060.89 = 355,484.50/x
  3. Step 3: Cross multiply
    657,290.50x = 907,060.89 × 355,484.50
  4. Step 4: Simplify right side
    657,290.50x = 322,446,086,951.21
  5. Step 5: Solve for x
    x = 322,446,086,951.21/657,290.50
  6. Step 6: Final answer
    x = 490,568.61

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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.