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Finding the Fourth Proportional to 345,679.40, 518,519.10 and 109,040.54

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Solution

The fourth proportional to 345,679.40, 518,519.10 and 109,040.54 is: 163,560.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,679.40 : 518,519.10 = 109,040.54 : x
  2. Step 2: Convert to fraction form
    345,679.40/518,519.10 = 109,040.54/x
  3. Step 3: Cross multiply
    345,679.40x = 518,519.10 × 109,040.54
  4. Step 4: Simplify right side
    345,679.40x = 56,539,602,664.31
  5. Step 5: Solve for x
    x = 56,539,602,664.31/345,679.40
  6. Step 6: Final answer
    x = 163,560.81

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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.