Home / 1,210.08-1,815.26-429.92

Finding the Fourth Proportional to 1,210.08, 1,815.26 and 429.92

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Solution

The fourth proportional to 1,210.08, 1,815.26 and 429.92 is: 644.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.08 : 1,815.26 = 429.92 : x
  2. Step 2: Convert to fraction form
    1,210.08/1,815.26 = 429.92/x
  3. Step 3: Cross multiply
    1,210.08x = 1,815.26 × 429.92
  4. Step 4: Simplify right side
    1,210.08x = 780,405.35
  5. Step 5: Solve for x
    x = 780,405.35/1,210.08
  6. Step 6: Final answer
    x = 644.92

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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.