Home / 1,209.83-1,815.66-561.02

Finding the Fourth Proportional to 1,209.83, 1,815.66 and 561.02

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Solution

The fourth proportional to 1,209.83, 1,815.66 and 561.02 is: 841.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.83 : 1,815.66 = 561.02 : x
  2. Step 2: Convert to fraction form
    1,209.83/1,815.66 = 561.02/x
  3. Step 3: Cross multiply
    1,209.83x = 1,815.66 × 561.02
  4. Step 4: Simplify right side
    1,209.83x = 1,018,626.11
  5. Step 5: Solve for x
    x = 1,018,626.11/1,209.83
  6. Step 6: Final answer
    x = 841.96

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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.