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Finding the Fourth Proportional to 343,730.40, 515,620.16 and 143,849.52

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Solution

The fourth proportional to 343,730.40, 515,620.16 and 143,849.52 is: 215,784.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,730.40 : 515,620.16 = 143,849.52 : x
  2. Step 2: Convert to fraction form
    343,730.40/515,620.16 = 143,849.52/x
  3. Step 3: Cross multiply
    343,730.40x = 515,620.16 × 143,849.52
  4. Step 4: Simplify right side
    343,730.40x = 74,171,712,518.32
  5. Step 5: Solve for x
    x = 74,171,712,518.32/343,730.40
  6. Step 6: Final answer
    x = 215,784.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.