Home / 728,213.42-1,005,365.09-647,417.34

Finding the Fourth Proportional to 728,213.42, 1,005,365.09 and 647,417.34

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Solution

The fourth proportional to 728,213.42, 1,005,365.09 and 647,417.34 is: 893,818.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,213.42 : 1,005,365.09 = 647,417.34 : x
  2. Step 2: Convert to fraction form
    728,213.42/1,005,365.09 = 647,417.34/x
  3. Step 3: Cross multiply
    728,213.42x = 1,005,365.09 × 647,417.34
  4. Step 4: Simplify right side
    728,213.42x = 650,890,793,915.20
  5. Step 5: Solve for x
    x = 650,890,793,915.20/728,213.42
  6. Step 6: Final answer
    x = 893,818.73

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Double scale
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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.