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Finding the Fourth Proportional to 3,565.59, 4,920.74 and 1,993.69

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Solution

The fourth proportional to 3,565.59, 4,920.74 and 1,993.69 is: 2,751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,565.59 : 4,920.74 = 1,993.69 : x
  2. Step 2: Convert to fraction form
    3,565.59/4,920.74 = 1,993.69/x
  3. Step 3: Cross multiply
    3,565.59x = 4,920.74 × 1,993.69
  4. Step 4: Simplify right side
    3,565.59x = 9,810,430.13
  5. Step 5: Solve for x
    x = 9,810,430.13/3,565.59
  6. Step 6: Final answer
    x = 2,751.42

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Half scale
Find fourth proportional to 7,131.18, 9,841.48 and 3,987.38
Double scale
Find fourth proportional to 3,566.59, 4,922.12 and 1,994.69
Similar ratio
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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.