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Finding the Fourth Proportional to 427,329.52, 640,699.04 and 187,328.32

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Solution

The fourth proportional to 427,329.52, 640,699.04 and 187,328.32 is: 280,863.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,329.52 : 640,699.04 = 187,328.32 : x
  2. Step 2: Convert to fraction form
    427,329.52/640,699.04 = 187,328.32/x
  3. Step 3: Cross multiply
    427,329.52x = 640,699.04 × 187,328.32
  4. Step 4: Simplify right side
    427,329.52x = 120,021,074,788.81
  5. Step 5: Solve for x
    x = 120,021,074,788.81/427,329.52
  6. Step 6: Final answer
    x = 280,863.06

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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.