Home / 1,185,985.41-1,636,657.48-642,121.64

Finding the Fourth Proportional to 1,185,985.41, 1,636,657.48 and 642,121.64

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Solution

The fourth proportional to 1,185,985.41, 1,636,657.48 and 642,121.64 is: 886,126.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185,985.41 : 1,636,657.48 = 642,121.64 : x
  2. Step 2: Convert to fraction form
    1,185,985.41/1,636,657.48 = 642,121.64/x
  3. Step 3: Cross multiply
    1,185,985.41x = 1,636,657.48 × 642,121.64
  4. Step 4: Simplify right side
    1,185,985.41x = 1,050,933,185,175.87
  5. Step 5: Solve for x
    x = 1,050,933,185,175.87/1,185,985.41
  6. Step 6: Final answer
    x = 886,126.57

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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.