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Finding the Fourth Proportional to 309,986.40, 464,864.40 and 122,959.20

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Solution

The fourth proportional to 309,986.40, 464,864.40 and 122,959.20 is: 184,393.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,986.40 : 464,864.40 = 122,959.20 : x
  2. Step 2: Convert to fraction form
    309,986.40/464,864.40 = 122,959.20/x
  3. Step 3: Cross multiply
    309,986.40x = 464,864.40 × 122,959.20
  4. Step 4: Simplify right side
    309,986.40x = 57,159,354,732.48
  5. Step 5: Solve for x
    x = 57,159,354,732.48/309,986.40
  6. Step 6: Final answer
    x = 184,393.10

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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.