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Finding the Fourth Proportional to 353,907.84, 530,712.72 and 143,398.56

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Solution

The fourth proportional to 353,907.84, 530,712.72 and 143,398.56 is: 215,037.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,907.84 : 530,712.72 = 143,398.56 : x
  2. Step 2: Convert to fraction form
    353,907.84/530,712.72 = 143,398.56/x
  3. Step 3: Cross multiply
    353,907.84x = 530,712.72 × 143,398.56
  4. Step 4: Simplify right side
    353,907.84x = 76,103,439,821.68
  5. Step 5: Solve for x
    x = 76,103,439,821.68/353,907.84
  6. Step 6: Final answer
    x = 215,037.45

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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.