Home / 858,531.40-1,287,797.10-438,627.40

Finding the Fourth Proportional to 858,531.40, 1,287,797.10 and 438,627.40

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Solution

The fourth proportional to 858,531.40, 1,287,797.10 and 438,627.40 is: 657,941.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,531.40 : 1,287,797.10 = 438,627.40 : x
  2. Step 2: Convert to fraction form
    858,531.40/1,287,797.10 = 438,627.40/x
  3. Step 3: Cross multiply
    858,531.40x = 1,287,797.10 × 438,627.40
  4. Step 4: Simplify right side
    858,531.40x = 564,863,093,700.54
  5. Step 5: Solve for x
    x = 564,863,093,700.54/858,531.40
  6. Step 6: Final answer
    x = 657,941.10

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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.