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Finding the Fourth Proportional to 517,255.40, 713,805.60 and 290,900.90

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Solution

The fourth proportional to 517,255.40, 713,805.60 and 290,900.90 is: 401,439.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,255.40 : 713,805.60 = 290,900.90 : x
  2. Step 2: Convert to fraction form
    517,255.40/713,805.60 = 290,900.90/x
  3. Step 3: Cross multiply
    517,255.40x = 713,805.60 × 290,900.90
  4. Step 4: Simplify right side
    517,255.40x = 207,646,691,465.04
  5. Step 5: Solve for x
    x = 207,646,691,465.04/517,255.40
  6. Step 6: Final answer
    x = 401,439.39

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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.