Home / 2,971.51-4,457.30-780.46

Finding the Fourth Proportional to 2,971.51, 4,457.30 and 780.46

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Solution

The fourth proportional to 2,971.51, 4,457.30 and 780.46 is: 1,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.51 : 4,457.30 = 780.46 : x
  2. Step 2: Convert to fraction form
    2,971.51/4,457.30 = 780.46/x
  3. Step 3: Cross multiply
    2,971.51x = 4,457.30 × 780.46
  4. Step 4: Simplify right side
    2,971.51x = 3,478,744.36
  5. Step 5: Solve for x
    x = 3,478,744.36/2,971.51
  6. Step 6: Final answer
    x = 1,170.70

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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.