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Finding the Fourth Proportional to 4,813.32, 7,215.12 and 4,385.64

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Solution

The fourth proportional to 4,813.32, 7,215.12 and 4,385.64 is: 6,574.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,813.32 : 7,215.12 = 4,385.64 : x
  2. Step 2: Convert to fraction form
    4,813.32/7,215.12 = 4,385.64/x
  3. Step 3: Cross multiply
    4,813.32x = 7,215.12 × 4,385.64
  4. Step 4: Simplify right side
    4,813.32x = 31,642,918.88
  5. Step 5: Solve for x
    x = 31,642,918.88/4,813.32
  6. Step 6: Final answer
    x = 6,574.03

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1.5x scale

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.