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Finding the Fourth Proportional to 636,187.37, 877,287.71 and 421,249.01

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Solution

The fourth proportional to 636,187.37, 877,287.71 and 421,249.01 is: 580,892.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,187.37 : 877,287.71 = 421,249.01 : x
  2. Step 2: Convert to fraction form
    636,187.37/877,287.71 = 421,249.01/x
  3. Step 3: Cross multiply
    636,187.37x = 877,287.71 × 421,249.01
  4. Step 4: Simplify right side
    636,187.37x = 369,556,575,989.35
  5. Step 5: Solve for x
    x = 369,556,575,989.35/636,187.37
  6. Step 6: Final answer
    x = 580,892.67

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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.