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Finding the Fourth Proportional to 517,040.40, 713,515.72 and 290,685.90

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Solution

The fourth proportional to 517,040.40, 713,515.72 and 290,685.90 is: 401,146.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,040.40 : 713,515.72 = 290,685.90 : x
  2. Step 2: Convert to fraction form
    517,040.40/713,515.72 = 290,685.90/x
  3. Step 3: Cross multiply
    517,040.40x = 713,515.72 × 290,685.90
  4. Step 4: Simplify right side
    517,040.40x = 207,408,959,232.35
  5. Step 5: Solve for x
    x = 207,408,959,232.35/517,040.40
  6. Step 6: Final answer
    x = 401,146.52

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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.