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Finding the Fourth Proportional to 328,490.88, 492,763.20 and 103,866.72

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Solution

The fourth proportional to 328,490.88, 492,763.20 and 103,866.72 is: 155,808.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,490.88 : 492,763.20 = 103,866.72 : x
  2. Step 2: Convert to fraction form
    328,490.88/492,763.20 = 103,866.72/x
  3. Step 3: Cross multiply
    328,490.88x = 492,763.20 × 103,866.72
  4. Step 4: Simplify right side
    328,490.88x = 51,181,697,320.70
  5. Step 5: Solve for x
    x = 51,181,697,320.70/328,490.88
  6. Step 6: Final answer
    x = 155,808.58

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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.