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Finding the Fourth Proportional to 328,271.60, 492,061.80 and 128,514.80

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Solution

The fourth proportional to 328,271.60, 492,061.80 and 128,514.80 is: 192,636.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,271.60 : 492,061.80 = 128,514.80 : x
  2. Step 2: Convert to fraction form
    328,271.60/492,061.80 = 128,514.80/x
  3. Step 3: Cross multiply
    328,271.60x = 492,061.80 × 128,514.80
  4. Step 4: Simplify right side
    328,271.60x = 63,237,223,814.64
  5. Step 5: Solve for x
    x = 63,237,223,814.64/328,271.60
  6. Step 6: Final answer
    x = 192,636.90

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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.