Home / 1,186,169.70-1,636,915.05-642,309.78

Finding the Fourth Proportional to 1,186,169.70, 1,636,915.05 and 642,309.78

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Solution

The fourth proportional to 1,186,169.70, 1,636,915.05 and 642,309.78 is: 886,387.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186,169.70 : 1,636,915.05 = 642,309.78 : x
  2. Step 2: Convert to fraction form
    1,186,169.70/1,636,915.05 = 642,309.78/x
  3. Step 3: Cross multiply
    1,186,169.70x = 1,636,915.05 × 642,309.78
  4. Step 4: Simplify right side
    1,186,169.70x = 1,051,406,545,644.19
  5. Step 5: Solve for x
    x = 1,051,406,545,644.19/1,186,169.70
  6. Step 6: Final answer
    x = 886,387.96

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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.