Home / 691,390.40-1,037,085.60-431,801.60

Finding the Fourth Proportional to 691,390.40, 1,037,085.60 and 431,801.60

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Solution

The fourth proportional to 691,390.40, 1,037,085.60 and 431,801.60 is: 647,702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,390.40 : 1,037,085.60 = 431,801.60 : x
  2. Step 2: Convert to fraction form
    691,390.40/1,037,085.60 = 431,801.60/x
  3. Step 3: Cross multiply
    691,390.40x = 1,037,085.60 × 431,801.60
  4. Step 4: Simplify right side
    691,390.40x = 447,815,221,416.96
  5. Step 5: Solve for x
    x = 447,815,221,416.96/691,390.40
  6. Step 6: Final answer
    x = 647,702.40

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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.