Home / 3,420.19-5,130.29-955.01

Finding the Fourth Proportional to 3,420.19, 5,130.29 and 955.01

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Solution

The fourth proportional to 3,420.19, 5,130.29 and 955.01 is: 1,432.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.19 : 5,130.29 = 955.01 : x
  2. Step 2: Convert to fraction form
    3,420.19/5,130.29 = 955.01/x
  3. Step 3: Cross multiply
    3,420.19x = 5,130.29 × 955.01
  4. Step 4: Simplify right side
    3,420.19x = 4,899,478.25
  5. Step 5: Solve for x
    x = 4,899,478.25/3,420.19
  6. Step 6: Final answer
    x = 1,432.52

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Double scale
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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.