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Finding the Fourth Proportional to 427,553.25, 640,051.28 and 258,562.14

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Solution

The fourth proportional to 427,553.25, 640,051.28 and 258,562.14 is: 387,069.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,553.25 : 640,051.28 = 258,562.14 : x
  2. Step 2: Convert to fraction form
    427,553.25/640,051.28 = 258,562.14/x
  3. Step 3: Cross multiply
    427,553.25x = 640,051.28 × 258,562.14
  4. Step 4: Simplify right side
    427,553.25x = 165,493,025,466.28
  5. Step 5: Solve for x
    x = 165,493,025,466.28/427,553.25
  6. Step 6: Final answer
    x = 387,069.98

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1.5x scale

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.