Home / 385,108.98-531,409.48-212,999.59

Finding the Fourth Proportional to 385,108.98, 531,409.48 and 212,999.59

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Solution

The fourth proportional to 385,108.98, 531,409.48 and 212,999.59 is: 293,916.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,108.98 : 531,409.48 = 212,999.59 : x
  2. Step 2: Convert to fraction form
    385,108.98/531,409.48 = 212,999.59/x
  3. Step 3: Cross multiply
    385,108.98x = 531,409.48 × 212,999.59
  4. Step 4: Simplify right side
    385,108.98x = 113,190,001,362.11
  5. Step 5: Solve for x
    x = 113,190,001,362.11/385,108.98
  6. Step 6: Final answer
    x = 293,916.81

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1.5x scale

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.