Home / 2,127.12-3,190.68-646.35

Finding the Fourth Proportional to 2,127.12, 3,190.68 and 646.35

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Solution

The fourth proportional to 2,127.12, 3,190.68 and 646.35 is: 969.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.12 : 3,190.68 = 646.35 : x
  2. Step 2: Convert to fraction form
    2,127.12/3,190.68 = 646.35/x
  3. Step 3: Cross multiply
    2,127.12x = 3,190.68 × 646.35
  4. Step 4: Simplify right side
    2,127.12x = 2,062,296.02
  5. Step 5: Solve for x
    x = 2,062,296.02/2,127.12
  6. Step 6: Final answer
    x = 969.53

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,128.12, 3,192.18 and 647.35
Similar ratio
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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.