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Finding the Fourth Proportional to 328,097.60, 492,218.40 and 128,417.60

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Solution

The fourth proportional to 328,097.60, 492,218.40 and 128,417.60 is: 192,654.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,097.60 : 492,218.40 = 128,417.60 : x
  2. Step 2: Convert to fraction form
    328,097.60/492,218.40 = 128,417.60/x
  3. Step 3: Cross multiply
    328,097.60x = 492,218.40 × 128,417.60
  4. Step 4: Simplify right side
    328,097.60x = 63,209,505,603.84
  5. Step 5: Solve for x
    x = 63,209,505,603.84/328,097.60
  6. Step 6: Final answer
    x = 192,654.58

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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.