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Finding the Fourth Proportional to 1,433,402.80, 1,978,096.20 and 788,822.98

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Solution

The fourth proportional to 1,433,402.80, 1,978,096.20 and 788,822.98 is: 1,088,575.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,402.80 : 1,978,096.20 = 788,822.98 : x
  2. Step 2: Convert to fraction form
    1,433,402.80/1,978,096.20 = 788,822.98/x
  3. Step 3: Cross multiply
    1,433,402.80x = 1,978,096.20 × 788,822.98
  4. Step 4: Simplify right side
    1,433,402.80x = 1,560,367,739,210.68
  5. Step 5: Solve for x
    x = 1,560,367,739,210.68/1,433,402.80
  6. Step 6: Final answer
    x = 1,088,575.90

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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.