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Finding the Fourth Proportional to 636,200.40, 877,305.66 and 421,262.04

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Solution

The fourth proportional to 636,200.40, 877,305.66 and 421,262.04 is: 580,910.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,200.40 : 877,305.66 = 421,262.04 : x
  2. Step 2: Convert to fraction form
    636,200.40/877,305.66 = 421,262.04/x
  3. Step 3: Cross multiply
    636,200.40x = 877,305.66 × 421,262.04
  4. Step 4: Simplify right side
    636,200.40x = 369,575,572,035.15
  5. Step 5: Solve for x
    x = 369,575,572,035.15/636,200.40
  6. Step 6: Final answer
    x = 580,910.63

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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.