Home / 858,266.20-1,287,421.19-259,246.90

Finding the Fourth Proportional to 858,266.20, 1,287,421.19 and 259,246.90

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Solution

The fourth proportional to 858,266.20, 1,287,421.19 and 259,246.90 is: 388,876.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,266.20 : 1,287,421.19 = 259,246.90 : x
  2. Step 2: Convert to fraction form
    858,266.20/1,287,421.19 = 259,246.90/x
  3. Step 3: Cross multiply
    858,266.20x = 1,287,421.19 × 259,246.90
  4. Step 4: Simplify right side
    858,266.20x = 333,759,952,501.81
  5. Step 5: Solve for x
    x = 333,759,952,501.81/858,266.20
  6. Step 6: Final answer
    x = 388,876.96

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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.