Home / 1,210.51-1,815.81-344.80

Finding the Fourth Proportional to 1,210.51, 1,815.81 and 344.80

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Solution

The fourth proportional to 1,210.51, 1,815.81 and 344.80 is: 517.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.51 : 1,815.81 = 344.80 : x
  2. Step 2: Convert to fraction form
    1,210.51/1,815.81 = 344.80/x
  3. Step 3: Cross multiply
    1,210.51x = 1,815.81 × 344.80
  4. Step 4: Simplify right side
    1,210.51x = 626,091.29
  5. Step 5: Solve for x
    x = 626,091.29/1,210.51
  6. Step 6: Final answer
    x = 517.21

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Double scale
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1.5x scale

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.