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Finding the Fourth Proportional to 279,703.08, 386,064.90 and 172,290.60

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Solution

The fourth proportional to 279,703.08, 386,064.90 and 172,290.60 is: 237,807.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,703.08 : 386,064.90 = 172,290.60 : x
  2. Step 2: Convert to fraction form
    279,703.08/386,064.90 = 172,290.60/x
  3. Step 3: Cross multiply
    279,703.08x = 386,064.90 × 172,290.60
  4. Step 4: Simplify right side
    279,703.08x = 66,515,353,259.94
  5. Step 5: Solve for x
    x = 66,515,353,259.94/279,703.08
  6. Step 6: Final answer
    x = 237,807.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.