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Finding the Fourth Proportional to 638,005.56, 880,486.84 and 351,525.57

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Solution

The fourth proportional to 638,005.56, 880,486.84 and 351,525.57 is: 485,126.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,005.56 : 880,486.84 = 351,525.57 : x
  2. Step 2: Convert to fraction form
    638,005.56/880,486.84 = 351,525.57/x
  3. Step 3: Cross multiply
    638,005.56x = 880,486.84 × 351,525.57
  4. Step 4: Simplify right side
    638,005.56x = 309,513,638,308.50
  5. Step 5: Solve for x
    x = 309,513,638,308.50/638,005.56
  6. Step 6: Final answer
    x = 485,126.87

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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.