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Finding the Fourth Proportional to 641,564.21, 885,298.63 and 383,389.93

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Solution

The fourth proportional to 641,564.21, 885,298.63 and 383,389.93 is: 529,042.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,564.21 : 885,298.63 = 383,389.93 : x
  2. Step 2: Convert to fraction form
    641,564.21/885,298.63 = 383,389.93/x
  3. Step 3: Cross multiply
    641,564.21x = 885,298.63 × 383,389.93
  4. Step 4: Simplify right side
    641,564.21x = 339,414,575,672.00
  5. Step 5: Solve for x
    x = 339,414,575,672.00/641,564.21
  6. Step 6: Final answer
    x = 529,042.25

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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.