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Finding the Fourth Proportional to 328,287.60, 492,139.80 and 216,021.60

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Solution

The fourth proportional to 328,287.60, 492,139.80 and 216,021.60 is: 323,840.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,287.60 : 492,139.80 = 216,021.60 : x
  2. Step 2: Convert to fraction form
    328,287.60/492,139.80 = 216,021.60/x
  3. Step 3: Cross multiply
    328,287.60x = 492,139.80 × 216,021.60
  4. Step 4: Simplify right side
    328,287.60x = 106,312,827,019.68
  5. Step 5: Solve for x
    x = 106,312,827,019.68/328,287.60
  6. Step 6: Final answer
    x = 323,840.52

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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.