Home / 328,113.48-492,211.26-128,408.07

Finding the Fourth Proportional to 328,113.48, 492,211.26 and 128,408.07

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Solution

The fourth proportional to 328,113.48, 492,211.26 and 128,408.07 is: 192,628.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,113.48 : 492,211.26 = 128,408.07 : x
  2. Step 2: Convert to fraction form
    328,113.48/492,211.26 = 128,408.07/x
  3. Step 3: Cross multiply
    328,113.48x = 492,211.26 × 128,408.07
  4. Step 4: Simplify right side
    328,113.48x = 63,203,897,928.87
  5. Step 5: Solve for x
    x = 63,203,897,928.87/328,113.48
  6. Step 6: Final answer
    x = 192,628.17

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1.5x scale

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.