Home / 1,259,886.80-1,889,830.20-728,445.80

Finding the Fourth Proportional to 1,259,886.80, 1,889,830.20 and 728,445.80

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Solution

The fourth proportional to 1,259,886.80, 1,889,830.20 and 728,445.80 is: 1,092,668.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,886.80 : 1,889,830.20 = 728,445.80 : x
  2. Step 2: Convert to fraction form
    1,259,886.80/1,889,830.20 = 728,445.80/x
  3. Step 3: Cross multiply
    1,259,886.80x = 1,889,830.20 × 728,445.80
  4. Step 4: Simplify right side
    1,259,886.80x = 1,376,638,871,903.16
  5. Step 5: Solve for x
    x = 1,376,638,871,903.16/1,259,886.80
  6. Step 6: Final answer
    x = 1,092,668.70

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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.