Home / 309,619.20-464,428.80-99,278.40

Finding the Fourth Proportional to 309,619.20, 464,428.80 and 99,278.40

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Solution

The fourth proportional to 309,619.20, 464,428.80 and 99,278.40 is: 148,917.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,619.20 : 464,428.80 = 99,278.40 : x
  2. Step 2: Convert to fraction form
    309,619.20/464,428.80 = 99,278.40/x
  3. Step 3: Cross multiply
    309,619.20x = 464,428.80 × 99,278.40
  4. Step 4: Simplify right side
    309,619.20x = 46,107,748,177.92
  5. Step 5: Solve for x
    x = 46,107,748,177.92/309,619.20
  6. Step 6: Final answer
    x = 148,917.60

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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.