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Finding the Fourth Proportional to 886,695.10, 1,330,237.05 and 287,554.30

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Solution

The fourth proportional to 886,695.10, 1,330,237.05 and 287,554.30 is: 431,394.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,695.10 : 1,330,237.05 = 287,554.30 : x
  2. Step 2: Convert to fraction form
    886,695.10/1,330,237.05 = 287,554.30/x
  3. Step 3: Cross multiply
    886,695.10x = 1,330,237.05 × 287,554.30
  4. Step 4: Simplify right side
    886,695.10x = 382,515,383,746.82
  5. Step 5: Solve for x
    x = 382,515,383,746.82/886,695.10
  6. Step 6: Final answer
    x = 431,394.49

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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.