Home / 858,560.40-1,287,840.60-438,656.40

Finding the Fourth Proportional to 858,560.40, 1,287,840.60 and 438,656.40

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Solution

The fourth proportional to 858,560.40, 1,287,840.60 and 438,656.40 is: 657,984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,560.40 : 1,287,840.60 = 438,656.40 : x
  2. Step 2: Convert to fraction form
    858,560.40/1,287,840.60 = 438,656.40/x
  3. Step 3: Cross multiply
    858,560.40x = 1,287,840.60 × 438,656.40
  4. Step 4: Simplify right side
    858,560.40x = 564,919,521,369.84
  5. Step 5: Solve for x
    x = 564,919,521,369.84/858,560.40
  6. Step 6: Final answer
    x = 657,984.60

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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.