Home / 1,590.20-2,192.95-1,217.19

Finding the Fourth Proportional to 1,590.20, 2,192.95 and 1,217.19

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Solution

The fourth proportional to 1,590.20, 2,192.95 and 1,217.19 is: 1,678.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.20 : 2,192.95 = 1,217.19 : x
  2. Step 2: Convert to fraction form
    1,590.20/2,192.95 = 1,217.19/x
  3. Step 3: Cross multiply
    1,590.20x = 2,192.95 × 1,217.19
  4. Step 4: Simplify right side
    1,590.20x = 2,669,236.81
  5. Step 5: Solve for x
    x = 2,669,236.81/1,590.20
  6. Step 6: Final answer
    x = 1,678.55

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.