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Finding the Fourth Proportional to 478,016.06, 659,049.48 and 391,656.89

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Solution

The fourth proportional to 478,016.06, 659,049.48 and 391,656.89 is: 539,984.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,016.06 : 659,049.48 = 391,656.89 : x
  2. Step 2: Convert to fraction form
    478,016.06/659,049.48 = 391,656.89/x
  3. Step 3: Cross multiply
    478,016.06x = 659,049.48 × 391,656.89
  4. Step 4: Simplify right side
    478,016.06x = 258,121,271,340.54
  5. Step 5: Solve for x
    x = 258,121,271,340.54/478,016.06
  6. Step 6: Final answer
    x = 539,984.52

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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.