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Finding the Fourth Proportional to 3,210.03, 4,814.55 and 870.21

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Solution

The fourth proportional to 3,210.03, 4,814.55 and 870.21 is: 1,305.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,210.03 : 4,814.55 = 870.21 : x
  2. Step 2: Convert to fraction form
    3,210.03/4,814.55 = 870.21/x
  3. Step 3: Cross multiply
    3,210.03x = 4,814.55 × 870.21
  4. Step 4: Simplify right side
    3,210.03x = 4,189,669.56
  5. Step 5: Solve for x
    x = 4,189,669.56/3,210.03
  6. Step 6: Final answer
    x = 1,305.18

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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.