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Finding the Fourth Proportional to 425,506.88, 638,354.95 and 185,659.66

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Solution

The fourth proportional to 425,506.88, 638,354.95 and 185,659.66 is: 278,530.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,506.88 : 638,354.95 = 185,659.66 : x
  2. Step 2: Convert to fraction form
    425,506.88/638,354.95 = 185,659.66/x
  3. Step 3: Cross multiply
    425,506.88x = 638,354.95 × 185,659.66
  4. Step 4: Simplify right side
    425,506.88x = 118,516,760,916.28
  5. Step 5: Solve for x
    x = 118,516,760,916.28/425,506.88
  6. Step 6: Final answer
    x = 278,530.77

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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.