Home / 858,807.45-1,287,719.10-259,678.80

Finding the Fourth Proportional to 858,807.45, 1,287,719.10 and 259,678.80

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Solution

The fourth proportional to 858,807.45, 1,287,719.10 and 259,678.80 is: 389,369.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,807.45 : 1,287,719.10 = 259,678.80 : x
  2. Step 2: Convert to fraction form
    858,807.45/1,287,719.10 = 259,678.80/x
  3. Step 3: Cross multiply
    858,807.45x = 1,287,719.10 × 259,678.80
  4. Step 4: Simplify right side
    858,807.45x = 334,393,350,625.08
  5. Step 5: Solve for x
    x = 334,393,350,625.08/858,807.45
  6. Step 6: Final answer
    x = 389,369.41

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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.