Home / 1,210.24-1,815.12-479.08

Finding the Fourth Proportional to 1,210.24, 1,815.12 and 479.08

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Solution

The fourth proportional to 1,210.24, 1,815.12 and 479.08 is: 718.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.24 : 1,815.12 = 479.08 : x
  2. Step 2: Convert to fraction form
    1,210.24/1,815.12 = 479.08/x
  3. Step 3: Cross multiply
    1,210.24x = 1,815.12 × 479.08
  4. Step 4: Simplify right side
    1,210.24x = 869,587.69
  5. Step 5: Solve for x
    x = 869,587.69/1,210.24
  6. Step 6: Final answer
    x = 718.52

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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.