Home / 1,210.23-1,815.12-479.10

Finding the Fourth Proportional to 1,210.23, 1,815.12 and 479.10

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Solution

The fourth proportional to 1,210.23, 1,815.12 and 479.10 is: 718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.23 : 1,815.12 = 479.10 : x
  2. Step 2: Convert to fraction form
    1,210.23/1,815.12 = 479.10/x
  3. Step 3: Cross multiply
    1,210.23x = 1,815.12 × 479.10
  4. Step 4: Simplify right side
    1,210.23x = 869,623.99
  5. Step 5: Solve for x
    x = 869,623.99/1,210.23
  6. Step 6: Final answer
    x = 718.56

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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.