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Finding the Fourth Proportional to 5,403.69, 7,457.09 and 2,919.69

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Solution

The fourth proportional to 5,403.69, 7,457.09 and 2,919.69 is: 4,029.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,403.69 : 7,457.09 = 2,919.69 : x
  2. Step 2: Convert to fraction form
    5,403.69/7,457.09 = 2,919.69/x
  3. Step 3: Cross multiply
    5,403.69x = 7,457.09 × 2,919.69
  4. Step 4: Simplify right side
    5,403.69x = 21,772,368.81
  5. Step 5: Solve for x
    x = 21,772,368.81/5,403.69
  6. Step 6: Final answer
    x = 4,029.17

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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.