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Finding the Fourth Proportional to 304,431.60, 456,647.40 and 138,219.60

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Solution

The fourth proportional to 304,431.60, 456,647.40 and 138,219.60 is: 207,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,431.60 : 456,647.40 = 138,219.60 : x
  2. Step 2: Convert to fraction form
    304,431.60/456,647.40 = 138,219.60/x
  3. Step 3: Cross multiply
    304,431.60x = 456,647.40 × 138,219.60
  4. Step 4: Simplify right side
    304,431.60x = 63,117,620,969.04
  5. Step 5: Solve for x
    x = 63,117,620,969.04/304,431.60
  6. Step 6: Final answer
    x = 207,329.40

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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.