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Finding the Fourth Proportional to 328,079.80, 492,094.10 and 128,361.40

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Solution

The fourth proportional to 328,079.80, 492,094.10 and 128,361.40 is: 192,532.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,079.80 : 492,094.10 = 128,361.40 : x
  2. Step 2: Convert to fraction form
    328,079.80/492,094.10 = 128,361.40/x
  3. Step 3: Cross multiply
    328,079.80x = 492,094.10 × 128,361.40
  4. Step 4: Simplify right side
    328,079.80x = 63,165,887,607.74
  5. Step 5: Solve for x
    x = 63,165,887,607.74/328,079.80
  6. Step 6: Final answer
    x = 192,532.08

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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.