Home / 1,138,879.40-1,708,975.20-429,416.60

Finding the Fourth Proportional to 1,138,879.40, 1,708,975.20 and 429,416.60

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Solution

The fourth proportional to 1,138,879.40, 1,708,975.20 and 429,416.60 is: 644,372.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,879.40 : 1,708,975.20 = 429,416.60 : x
  2. Step 2: Convert to fraction form
    1,138,879.40/1,708,975.20 = 429,416.60/x
  3. Step 3: Cross multiply
    1,138,879.40x = 1,708,975.20 × 429,416.60
  4. Step 4: Simplify right side
    1,138,879.40x = 733,862,319,868.32
  5. Step 5: Solve for x
    x = 733,862,319,868.32/1,138,879.40
  6. Step 6: Final answer
    x = 644,372.28

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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.