Home / 328,530.84-492,849.51-128,742.90

Finding the Fourth Proportional to 328,530.84, 492,849.51 and 128,742.90

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Solution

The fourth proportional to 328,530.84, 492,849.51 and 128,742.90 is: 193,135.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,530.84 : 492,849.51 = 128,742.90 : x
  2. Step 2: Convert to fraction form
    328,530.84/492,849.51 = 128,742.90/x
  3. Step 3: Cross multiply
    328,530.84x = 492,849.51 × 128,742.90
  4. Step 4: Simplify right side
    328,530.84x = 63,450,875,180.98
  5. Step 5: Solve for x
    x = 63,450,875,180.98/328,530.84
  6. Step 6: Final answer
    x = 193,135.22

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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.