Home / 2,971.62-4,457.25-780.35

Finding the Fourth Proportional to 2,971.62, 4,457.25 and 780.35

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Solution

The fourth proportional to 2,971.62, 4,457.25 and 780.35 is: 1,170.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.62 : 4,457.25 = 780.35 : x
  2. Step 2: Convert to fraction form
    2,971.62/4,457.25 = 780.35/x
  3. Step 3: Cross multiply
    2,971.62x = 4,457.25 × 780.35
  4. Step 4: Simplify right side
    2,971.62x = 3,478,192.75
  5. Step 5: Solve for x
    x = 3,478,192.75/2,971.62
  6. Step 6: Final answer
    x = 1,170.47

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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.