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Finding the Fourth Proportional to 351,510.40, 485,093.23 and 215,619.28

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Solution

The fourth proportional to 351,510.40, 485,093.23 and 215,619.28 is: 297,560.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,510.40 : 485,093.23 = 215,619.28 : x
  2. Step 2: Convert to fraction form
    351,510.40/485,093.23 = 215,619.28/x
  3. Step 3: Cross multiply
    351,510.40x = 485,093.23 × 215,619.28
  4. Step 4: Simplify right side
    351,510.40x = 104,595,452,985.47
  5. Step 5: Solve for x
    x = 104,595,452,985.47/351,510.40
  6. Step 6: Final answer
    x = 297,560.05

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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.