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Finding the Fourth Proportional to 304,428.60, 420,062.40 and 191,171.16

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Solution

The fourth proportional to 304,428.60, 420,062.40 and 191,171.16 is: 263,785.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,428.60 : 420,062.40 = 191,171.16 : x
  2. Step 2: Convert to fraction form
    304,428.60/420,062.40 = 191,171.16/x
  3. Step 3: Cross multiply
    304,428.60x = 420,062.40 × 191,171.16
  4. Step 4: Simplify right side
    304,428.60x = 80,303,816,280.38
  5. Step 5: Solve for x
    x = 80,303,816,280.38/304,428.60
  6. Step 6: Final answer
    x = 263,785.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.