Home / 385,289.48-531,670.50-215,490.80

Finding the Fourth Proportional to 385,289.48, 531,670.50 and 215,490.80

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Solution

The fourth proportional to 385,289.48, 531,670.50 and 215,490.80 is: 297,361.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,289.48 : 531,670.50 = 215,490.80 : x
  2. Step 2: Convert to fraction form
    385,289.48/531,670.50 = 215,490.80/x
  3. Step 3: Cross multiply
    385,289.48x = 531,670.50 × 215,490.80
  4. Step 4: Simplify right side
    385,289.48x = 114,570,101,381.40
  5. Step 5: Solve for x
    x = 114,570,101,381.40/385,289.48
  6. Step 6: Final answer
    x = 297,361.09

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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.