Home / 345,986.10-518,979.15-257,412.60

Finding the Fourth Proportional to 345,986.10, 518,979.15 and 257,412.60

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Solution

The fourth proportional to 345,986.10, 518,979.15 and 257,412.60 is: 386,118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,986.10 : 518,979.15 = 257,412.60 : x
  2. Step 2: Convert to fraction form
    345,986.10/518,979.15 = 257,412.60/x
  3. Step 3: Cross multiply
    345,986.10x = 518,979.15 × 257,412.60
  4. Step 4: Simplify right side
    345,986.10x = 133,591,772,347.29
  5. Step 5: Solve for x
    x = 133,591,772,347.29/345,986.10
  6. Step 6: Final answer
    x = 386,118.90

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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.