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Finding the Fourth Proportional to 665,980.80, 998,971.20 and 292,003.80

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Solution

The fourth proportional to 665,980.80, 998,971.20 and 292,003.80 is: 438,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,980.80 : 998,971.20 = 292,003.80 : x
  2. Step 2: Convert to fraction form
    665,980.80/998,971.20 = 292,003.80/x
  3. Step 3: Cross multiply
    665,980.80x = 998,971.20 × 292,003.80
  4. Step 4: Simplify right side
    665,980.80x = 291,703,386,490.56
  5. Step 5: Solve for x
    x = 291,703,386,490.56/665,980.80
  6. Step 6: Final answer
    x = 438,005.70

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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.