Home / 330,381.07-455,911.27-187,138.24

Finding the Fourth Proportional to 330,381.07, 455,911.27 and 187,138.24

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Solution

The fourth proportional to 330,381.07, 455,911.27 and 187,138.24 is: 258,242.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,381.07 : 455,911.27 = 187,138.24 : x
  2. Step 2: Convert to fraction form
    330,381.07/455,911.27 = 187,138.24/x
  3. Step 3: Cross multiply
    330,381.07x = 455,911.27 × 187,138.24
  4. Step 4: Simplify right side
    330,381.07x = 85,318,432,663.96
  5. Step 5: Solve for x
    x = 85,318,432,663.96/330,381.07
  6. Step 6: Final answer
    x = 258,242.50

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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.