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Finding the Fourth Proportional to 328,990.80, 493,601.40 and 142,136.40

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Solution

The fourth proportional to 328,990.80, 493,601.40 and 142,136.40 is: 213,254.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,990.80 : 493,601.40 = 142,136.40 : x
  2. Step 2: Convert to fraction form
    328,990.80/493,601.40 = 142,136.40/x
  3. Step 3: Cross multiply
    328,990.80x = 493,601.40 × 142,136.40
  4. Step 4: Simplify right side
    328,990.80x = 70,158,726,030.96
  5. Step 5: Solve for x
    x = 70,158,726,030.96/328,990.80
  6. Step 6: Final answer
    x = 213,254.37

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1.5x scale

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.