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Finding the Fourth Proportional to 328,521.68, 493,059.48 and 128,982.20

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Solution

The fourth proportional to 328,521.68, 493,059.48 and 128,982.20 is: 193,582.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,521.68 : 493,059.48 = 128,982.20 : x
  2. Step 2: Convert to fraction form
    328,521.68/493,059.48 = 128,982.20/x
  3. Step 3: Cross multiply
    328,521.68x = 493,059.48 × 128,982.20
  4. Step 4: Simplify right side
    328,521.68x = 63,595,896,461.26
  5. Step 5: Solve for x
    x = 63,595,896,461.26/328,521.68
  6. Step 6: Final answer
    x = 193,582.04

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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.