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Finding the Fourth Proportional to 638,175.60, 880,680.28 and 351,695.60

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Solution

The fourth proportional to 638,175.60, 880,680.28 and 351,695.60 is: 485,338.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,175.60 : 880,680.28 = 351,695.60 : x
  2. Step 2: Convert to fraction form
    638,175.60/880,680.28 = 351,695.60/x
  3. Step 3: Cross multiply
    638,175.60x = 880,680.28 × 351,695.60
  4. Step 4: Simplify right side
    638,175.60x = 309,731,379,482.77
  5. Step 5: Solve for x
    x = 309,731,379,482.77/638,175.60
  6. Step 6: Final answer
    x = 485,338.80

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Double scale
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Similar ratio
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1.5x scale

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.