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Finding the Fourth Proportional to 858,420, 1,287,210.96 and 259,266.24

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Solution

The fourth proportional to 858,420, 1,287,210.96 and 259,266.24 is: 388,772.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,420 : 1,287,210.96 = 259,266.24 : x
  2. Step 2: Convert to fraction form
    858,420/1,287,210.96 = 259,266.24/x
  3. Step 3: Cross multiply
    858,420x = 1,287,210.96 × 259,266.24
  4. Step 4: Simplify right side
    858,420x = 333,730,345,685.99
  5. Step 5: Solve for x
    x = 333,730,345,685.99/858,420
  6. Step 6: Final answer
    x = 388,772.80

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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.