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Finding the Fourth Proportional to 1,318,909.03, 1,978,674.50 and 1,050,053.61

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Solution

The fourth proportional to 1,318,909.03, 1,978,674.50 and 1,050,053.61 is: 1,575,327.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,909.03 : 1,978,674.50 = 1,050,053.61 : x
  2. Step 2: Convert to fraction form
    1,318,909.03/1,978,674.50 = 1,050,053.61/x
  3. Step 3: Cross multiply
    1,318,909.03x = 1,978,674.50 × 1,050,053.61
  4. Step 4: Simplify right side
    1,318,909.03x = 2,077,714,301,739.95
  5. Step 5: Solve for x
    x = 2,077,714,301,739.95/1,318,909.03
  6. Step 6: Final answer
    x = 1,575,327.98

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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.