Home / 1,187,211.29-1,638,381.51-728,579.16

Finding the Fourth Proportional to 1,187,211.29, 1,638,381.51 and 728,579.16

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Solution

The fourth proportional to 1,187,211.29, 1,638,381.51 and 728,579.16 is: 1,005,457.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,211.29 : 1,638,381.51 = 728,579.16 : x
  2. Step 2: Convert to fraction form
    1,187,211.29/1,638,381.51 = 728,579.16/x
  3. Step 3: Cross multiply
    1,187,211.29x = 1,638,381.51 × 728,579.16
  4. Step 4: Simplify right side
    1,187,211.29x = 1,193,690,624,315.33
  5. Step 5: Solve for x
    x = 1,193,690,624,315.33/1,187,211.29
  6. Step 6: Final answer
    x = 1,005,457.61

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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.