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Finding the Fourth Proportional to 328,078.80, 492,701.40 and 239,432.40

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Solution

The fourth proportional to 328,078.80, 492,701.40 and 239,432.40 is: 359,574.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,078.80 : 492,701.40 = 239,432.40 : x
  2. Step 2: Convert to fraction form
    328,078.80/492,701.40 = 239,432.40/x
  3. Step 3: Cross multiply
    328,078.80x = 492,701.40 × 239,432.40
  4. Step 4: Simplify right side
    328,078.80x = 117,968,678,685.36
  5. Step 5: Solve for x
    x = 117,968,678,685.36/328,078.80
  6. Step 6: Final answer
    x = 359,574.22

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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.