Home / 3,210.12-4,814.76-870.30

Finding the Fourth Proportional to 3,210.12, 4,814.76 and 870.30

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Solution

The fourth proportional to 3,210.12, 4,814.76 and 870.30 is: 1,305.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,210.12 : 4,814.76 = 870.30 : x
  2. Step 2: Convert to fraction form
    3,210.12/4,814.76 = 870.30/x
  3. Step 3: Cross multiply
    3,210.12x = 4,814.76 × 870.30
  4. Step 4: Simplify right side
    3,210.12x = 4,190,285.63
  5. Step 5: Solve for x
    x = 4,190,285.63/3,210.12
  6. Step 6: Final answer
    x = 1,305.34

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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.