Home / 728,181.55-1,005,321.56-647,385.91

Finding the Fourth Proportional to 728,181.55, 1,005,321.56 and 647,385.91

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Solution

The fourth proportional to 728,181.55, 1,005,321.56 and 647,385.91 is: 893,775.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,181.55 : 1,005,321.56 = 647,385.91 : x
  2. Step 2: Convert to fraction form
    728,181.55/1,005,321.56 = 647,385.91/x
  3. Step 3: Cross multiply
    728,181.55x = 1,005,321.56 × 647,385.91
  4. Step 4: Simplify right side
    728,181.55x = 650,831,014,624.49
  5. Step 5: Solve for x
    x = 650,831,014,624.49/728,181.55
  6. Step 6: Final answer
    x = 893,775.75

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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.