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Finding the Fourth Proportional to 638,259.56, 880,803.54 and 351,780.38

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Solution

The fourth proportional to 638,259.56, 880,803.54 and 351,780.38 is: 485,459.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,259.56 : 880,803.54 = 351,780.38 : x
  2. Step 2: Convert to fraction form
    638,259.56/880,803.54 = 351,780.38/x
  3. Step 3: Cross multiply
    638,259.56x = 880,803.54 × 351,780.38
  4. Step 4: Simplify right side
    638,259.56x = 309,849,404,006.55
  5. Step 5: Solve for x
    x = 309,849,404,006.55/638,259.56
  6. Step 6: Final answer
    x = 485,459.87

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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.