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Finding the Fourth Proportional to 256,991.70, 385,502.67 and 99,220.98

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Solution

The fourth proportional to 256,991.70, 385,502.67 and 99,220.98 is: 148,837.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,991.70 : 385,502.67 = 99,220.98 : x
  2. Step 2: Convert to fraction form
    256,991.70/385,502.67 = 99,220.98/x
  3. Step 3: Cross multiply
    256,991.70x = 385,502.67 × 99,220.98
  4. Step 4: Simplify right side
    256,991.70x = 38,249,952,710.02
  5. Step 5: Solve for x
    x = 38,249,952,710.02/256,991.70
  6. Step 6: Final answer
    x = 148,837.31

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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.