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Finding the Fourth Proportional to 425,856, 638,784.96 and 130,368

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Solution

The fourth proportional to 425,856, 638,784.96 and 130,368 is: 195,552.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,856 : 638,784.96 = 130,368 : x
  2. Step 2: Convert to fraction form
    425,856/638,784.96 = 130,368/x
  3. Step 3: Cross multiply
    425,856x = 638,784.96 × 130,368
  4. Step 4: Simplify right side
    425,856x = 83,277,117,665.28
  5. Step 5: Solve for x
    x = 83,277,117,665.28/425,856
  6. Step 6: Final answer
    x = 195,552.29

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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.