Home / 728,085.60-1,092,128.40-476,143.20

Finding the Fourth Proportional to 728,085.60, 1,092,128.40 and 476,143.20

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Solution

The fourth proportional to 728,085.60, 1,092,128.40 and 476,143.20 is: 714,214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,085.60 : 1,092,128.40 = 476,143.20 : x
  2. Step 2: Convert to fraction form
    728,085.60/1,092,128.40 = 476,143.20/x
  3. Step 3: Cross multiply
    728,085.60x = 1,092,128.40 × 476,143.20
  4. Step 4: Simplify right side
    728,085.60x = 520,009,511,186.88
  5. Step 5: Solve for x
    x = 520,009,511,186.88/728,085.60
  6. Step 6: Final answer
    x = 714,214.80

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Double scale
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Similar ratio
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1.5x scale

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.