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Finding the Fourth Proportional to 426,159.63, 638,790.04 and 141,774

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Solution

The fourth proportional to 426,159.63, 638,790.04 and 141,774 is: 212,511.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,159.63 : 638,790.04 = 141,774 : x
  2. Step 2: Convert to fraction form
    426,159.63/638,790.04 = 141,774/x
  3. Step 3: Cross multiply
    426,159.63x = 638,790.04 × 141,774
  4. Step 4: Simplify right side
    426,159.63x = 90,563,819,130.96
  5. Step 5: Solve for x
    x = 90,563,819,130.96/426,159.63
  6. Step 6: Final answer
    x = 212,511.49

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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.