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Finding the Fourth Proportional to 343,904.40, 515,856.60 and 203,590.80

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Solution

The fourth proportional to 343,904.40, 515,856.60 and 203,590.80 is: 305,386.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,904.40 : 515,856.60 = 203,590.80 : x
  2. Step 2: Convert to fraction form
    343,904.40/515,856.60 = 203,590.80/x
  3. Step 3: Cross multiply
    343,904.40x = 515,856.60 × 203,590.80
  4. Step 4: Simplify right side
    343,904.40x = 105,023,657,879.28
  5. Step 5: Solve for x
    x = 105,023,657,879.28/343,904.40
  6. Step 6: Final answer
    x = 305,386.20

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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.