Home / 1,187,142.83-1,638,287.22-728,510.72

Finding the Fourth Proportional to 1,187,142.83, 1,638,287.22 and 728,510.72

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Solution

The fourth proportional to 1,187,142.83, 1,638,287.22 and 728,510.72 is: 1,005,363.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,142.83 : 1,638,287.22 = 728,510.72 : x
  2. Step 2: Convert to fraction form
    1,187,142.83/1,638,287.22 = 728,510.72/x
  3. Step 3: Cross multiply
    1,187,142.83x = 1,638,287.22 × 728,510.72
  4. Step 4: Simplify right side
    1,187,142.83x = 1,193,509,802,209.00
  5. Step 5: Solve for x
    x = 1,193,509,802,209.00/1,187,142.83
  6. Step 6: Final answer
    x = 1,005,363.27

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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.