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Finding the Fourth Proportional to 2,430.05, 3,645.58 and 870.09

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Solution

The fourth proportional to 2,430.05, 3,645.58 and 870.09 is: 1,305.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,430.05 : 3,645.58 = 870.09 : x
  2. Step 2: Convert to fraction form
    2,430.05/3,645.58 = 870.09/x
  3. Step 3: Cross multiply
    2,430.05x = 3,645.58 × 870.09
  4. Step 4: Simplify right side
    2,430.05x = 3,171,991.44
  5. Step 5: Solve for x
    x = 3,171,991.44/2,430.05
  6. Step 6: Final answer
    x = 1,305.32

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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.