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Finding the Fourth Proportional to 349,928.70, 524,115.45 and 287,720.70

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Solution

The fourth proportional to 349,928.70, 524,115.45 and 287,720.70 is: 430,941.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,928.70 : 524,115.45 = 287,720.70 : x
  2. Step 2: Convert to fraction form
    349,928.70/524,115.45 = 287,720.70/x
  3. Step 3: Cross multiply
    349,928.70x = 524,115.45 × 287,720.70
  4. Step 4: Simplify right side
    349,928.70x = 150,798,864,154.82
  5. Step 5: Solve for x
    x = 150,798,864,154.82/349,928.70
  6. Step 6: Final answer
    x = 430,941.69

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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.