Home / 1,355.16-2,019.15-1,209.63

Finding the Fourth Proportional to 1,355.16, 2,019.15 and 1,209.63

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Solution

The fourth proportional to 1,355.16, 2,019.15 and 1,209.63 is: 1,802.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.16 : 2,019.15 = 1,209.63 : x
  2. Step 2: Convert to fraction form
    1,355.16/2,019.15 = 1,209.63/x
  3. Step 3: Cross multiply
    1,355.16x = 2,019.15 × 1,209.63
  4. Step 4: Simplify right side
    1,355.16x = 2,442,424.41
  5. Step 5: Solve for x
    x = 2,442,424.41/1,355.16
  6. Step 6: Final answer
    x = 1,802.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.