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Finding the Fourth Proportional to 328,871.40, 493,115.67 and 128,957.46

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Solution

The fourth proportional to 328,871.40, 493,115.67 and 128,957.46 is: 193,361.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,871.40 : 493,115.67 = 128,957.46 : x
  2. Step 2: Convert to fraction form
    328,871.40/493,115.67 = 128,957.46/x
  3. Step 3: Cross multiply
    328,871.40x = 493,115.67 × 128,957.46
  4. Step 4: Simplify right side
    328,871.40x = 63,590,944,289.40
  5. Step 5: Solve for x
    x = 63,590,944,289.40/328,871.40
  6. Step 6: Final answer
    x = 193,361.13

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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.