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Finding the Fourth Proportional to 328,291.60, 492,091.80 and 128,534.80

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Solution

The fourth proportional to 328,291.60, 492,091.80 and 128,534.80 is: 192,666.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,291.60 : 492,091.80 = 128,534.80 : x
  2. Step 2: Convert to fraction form
    328,291.60/492,091.80 = 128,534.80/x
  3. Step 3: Cross multiply
    328,291.60x = 492,091.80 × 128,534.80
  4. Step 4: Simplify right side
    328,291.60x = 63,250,921,094.64
  5. Step 5: Solve for x
    x = 63,250,921,094.64/328,291.60
  6. Step 6: Final answer
    x = 192,666.89

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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.