Home / 858,610.40-1,287,915.60-485,362.40

Finding the Fourth Proportional to 858,610.40, 1,287,915.60 and 485,362.40

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Solution

The fourth proportional to 858,610.40, 1,287,915.60 and 485,362.40 is: 728,043.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,610.40 : 1,287,915.60 = 485,362.40 : x
  2. Step 2: Convert to fraction form
    858,610.40/1,287,915.60 = 485,362.40/x
  3. Step 3: Cross multiply
    858,610.40x = 1,287,915.60 × 485,362.40
  4. Step 4: Simplify right side
    858,610.40x = 625,105,806,613.44
  5. Step 5: Solve for x
    x = 625,105,806,613.44/858,610.40
  6. Step 6: Final answer
    x = 728,043.60

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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.